MC <p>06a7</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a 5-membered nitrogenous ring and a pKa close to pH 7'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>0bbe</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a shorter amine-substituted carboxylate (amide) -C(=O)NH<sub>2</sub> group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>0edc</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a shorter version of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>1046</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of isoleucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>1189</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that is capable of thiol (-SH) chemistry'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>11a6</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with a single methyl group (-CH<sub>3</sub>) as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>15ea</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>1bae</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with the smallest <strong><span style="color: #6d108e;">side chain</span></strong> containing a hydroxyl group (-OH)'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>1d1b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing an amine group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect MC <p>2266</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a phenol (-C<sub>6</sub>H<sub>6</sub>OH) group, derived from phenylalanine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Correct MC <p>2599</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated γ-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>2656</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a valine with a extra methyl group (-CH<sub>3</sub>) at the end'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>27d6</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with an aromatic <strong><span style="color: #6d108e;">side chain</span></strong> containing a single benzene (-C<sub>6</sub>H<sub>6</sub>) ring'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>2803</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a thiol (-SH) group that can form disulfide bonds'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>287b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a thiol (-SH) group that can form disulfide bonds'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>294e</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>296e</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>2bcf</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect MC <p>2e4c</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a longer amine-substituted carboxylate (amide) -C(=O)NH<sub>2</sub> group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect MC <p>314d</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> where the <strong><span style="color: #6d108e;">side chain</span></strong> is bonded to the backbone amine, resulting in a rigid cyclic structure'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>31d1</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>31f6</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated γ-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>3423</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>37fc</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with the smallest polar <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct MC <p>3e45</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing an amine group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>3f3a</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a 5-membered nitrogenous ring and a pKa close to pH 7'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>402b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that can form disulfide bridges'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>453a</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that is capable of thiol (-SH) chemistry'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>488b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with the simple chemical formula NH<sub>2</sub>-CH<sub>2</sub>-COOH'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>4a16</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>4c93</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">O<span style="display: inline-block; transform: scaleX(1.5); padding-right: 0.15em; padding-left: 0.15em;">=</span>C<strong>–</strong>OH</td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td rowspan=2 style="border: none;">H</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>2</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">SH</td> </tr> <tr> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">H<strong>–</strong>N<strong>–</strong>H</td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>4f8c</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with the shortest hydrophobic <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>5043</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a valine with a extra methyl group (-CH<sub>3</sub>) at the end'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>50ed</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>5352</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">O<span style="display: inline-block; transform: scaleX(1.5); padding-right: 0.15em; padding-left: 0.15em;">=</span>C<strong>–</strong>OH</td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td rowspan=2 style="border: none;">H</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>2</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">OH</td> </tr> <tr> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">H<strong>–</strong>N<strong>–</strong>H</td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>5406</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a longer version of valine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>541e</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>565d</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that is a methylated form of serine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Correct MC <p>579b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated β-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>59c4</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with the smallest polar <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>5a6d</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a thiol (-SH) group that can form disulfide bonds'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect MC <p>5dcf</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>5dd6</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a longer version of valine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct MC <p>67c9</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a phenol (-C<sub>6</sub>H<sub>6</sub>OH) group, derived from phenylalanine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Correct MC <p>699f</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> where the <strong><span style="color: #6d108e;">side chain</span></strong> is bonded to the backbone amine, resulting in a rigid cyclic structure'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>7112</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated β-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>72a2</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a sulfur atom that is<strong> <strong>NOT</strong> </strong>available for chemical reactions'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>778d</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated β-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>7bc9</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of isoleucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>7cc6</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with an aromatic <strong><span style="color: #6d108e;">side chain</span></strong> containing a single benzene (-C<sub>6</sub>H<sub>6</sub>) ring'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>831d</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr><!-- top atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=2 style="border: none;" align="center">H</td> <td style="border: none;"></td> </tr> <tr><!-- top vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- middle bonds atoms and lines --> <td rowspan=2 colspan=2 style="border: none;" align="center"><sup>–</sup>OOC</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>3</sub></td> </tr> <tr><!-- left over middle bond lines --> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr><!-- bottom vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- bottom atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">NH<sub>3</sub><sup>+</sup></td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>878a</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with the smallest <strong><span style="color: #6d108e;">side chain</span></strong> containing a hydroxyl group (-OH)'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct MC <p>8b57</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with a single hydrogen atom as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>8ec0</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a longer amine-substituted carboxylate (amide) -C(=O)NH<sub>2</sub> group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>9071</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with the simple chemical formula NH<sub>2</sub>-CH<sub>2</sub>-COOH'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>9438</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>95c2</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with only a methyl group (-CH<sub>3</sub>) attached to the α-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect MC <p>97c4</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> where the <strong><span style="color: #6d108e;">side chain</span></strong> is bonded to the backbone amine, resulting in a rigid cyclic structure'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>9b33</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with a double methylated γ-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>9c32</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that can form disulfide bridges'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>a0e9</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with only a methyl group (-CH<sub>3</sub>) attached to the α-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>a381</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">O<span style="display: inline-block; transform: scaleX(1.5); padding-right: 0.15em; padding-left: 0.15em;">=</span>C<strong>–</strong>OH</td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td rowspan=2 style="border: none;">H</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>2</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">SH</td> </tr> <tr> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">H<strong>–</strong>N<strong>–</strong>H</td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>a62f</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">O<span style="display: inline-block; transform: scaleX(1.5); padding-right: 0.15em; padding-left: 0.15em;">=</span>C<strong>–</strong>OH</td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td rowspan=2 style="border: none;">H</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>2</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">OH</td> </tr> <tr> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">H<strong>–</strong>N<strong>–</strong>H</td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>a962</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a sulfur atom that is<strong> <strong>NOT</strong> </strong>available for chemical reactions'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect MC <p>aaa7</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with a single methyl group (-CH<sub>3</sub>) as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>ad95</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with only a methyl group (-CH<sub>3</sub>) attached to the α-carbon'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>aeee</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a shorter amine-substituted carboxylate (amide) -C(=O)NH<sub>2</sub> group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect MC <p>af4a</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing 3 nitrogen atoms (guanidinium)'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>b04f</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a valine with a extra methyl group (-CH<sub>3</sub>) at the end'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>b67e</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with the largest <strong><span style="color: #6d108e;">side chain</span></strong> consisting of a fused pair of rings'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Correct MC <p>b7be</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a small, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>bb42</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with the largest <strong><span style="color: #6d108e;">side chain</span></strong> consisting of a fused pair of rings'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>bc2a</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with the simple chemical formula NH<sub>2</sub>-CH<sub>2</sub>-COOH'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>bd16</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing an amine group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>c0cf</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr><!-- top atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=2 style="border: none;" align="center">H</td> <td style="border: none;"></td> </tr> <tr><!-- top vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- middle bonds atoms and lines --> <td rowspan=2 colspan=2 style="border: none;" align="center"><sup>–</sup>OOC</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">H</td> </tr> <tr><!-- left over middle bond lines --> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr><!-- bottom vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- bottom atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">NH<sub>3</sub><sup>+</sup></td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>c130</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">O<span style="display: inline-block; transform: scaleX(1.5); padding-right: 0.15em; padding-left: 0.15em;">=</span>C<strong>–</strong>OH</td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td rowspan=2 style="border: none;">H</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>2</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">SH</td> </tr> <tr> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">H<strong>–</strong>N<strong>–</strong>H</td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect MC <p>c1ad</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with the largest <strong><span style="color: #6d108e;">side chain</span></strong> consisting of a fused pair of rings'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Correct MC <p>c312</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a sulfur atom that is<strong> <strong>NOT</strong> </strong>available for chemical reactions'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>c3d5</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with a single hydrogen atom as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>ca46</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> that can form disulfide bridges'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>d006</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #009e4c;">polar amino acid</span></strong> with a shorter amine-substituted carboxylate (amide) -C(=O)NH<sub>2</sub> group'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect MC <p>d4f5</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of isoleucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>d62f</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #2fbd0f;">small amino acid</span></strong> with a single hydrogen atom as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect MC <p>d6b0</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with the shortest hydrophobic <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>da54</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a shorter version of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>da6f</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing 3 nitrogen atoms (guanidinium)'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">cysteine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>dabd</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is a shorter version of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>dca1</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr><!-- top atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=2 style="border: none;" align="center">H</td> <td style="border: none;"></td> </tr> <tr><!-- top vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- middle bonds atoms and lines --> <td rowspan=2 colspan=2 style="border: none;" align="center"><sup>–</sup>OOC</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>3</sub></td> </tr> <tr><!-- left over middle bond lines --> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr><!-- bottom vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- bottom atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">NH<sub>3</sub><sup>+</sup></td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect MC <p>de3e</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong> with an aromatic <strong><span style="color: #6d108e;">side chain</span></strong> containing a single benzene (-C<sub>6</sub>H<sub>6</sub>) ring'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Correct E. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect MC <p>de75</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr><!-- top atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=2 style="border: none;" align="center">H</td> <td style="border: none;"></td> </tr> <tr><!-- top vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- middle bonds atoms and lines --> <td rowspan=2 colspan=2 style="border: none;" align="center"><sup>–</sup>OOC</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">CH<sub>3</sub></td> </tr> <tr><!-- left over middle bond lines --> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr><!-- bottom vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- bottom atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">NH<sub>3</sub><sup>+</sup></td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>e1e3</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #0d57a5;">positively charged amino acid</span></strong> with a long, flexible <strong><span style="color: #6d108e;">side chain</span></strong> containing 3 nitrogen atoms (guanidinium)'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">arginine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>e4dc</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'an <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a 5-membered nitrogenous ring and a pKa close to pH 7'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Correct D. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect MC <p>e5e5</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> that is an isomer of leucine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">isoleucine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">serine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>ee20</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Incorrect MC <p>f170</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff0000;">negatively charged amino acid</span></strong> with a large, carboxylate (-COOH) <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">aspartate</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamate</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tryptophan</span> Incorrect MC <p>f20b</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #b3b300;">non-<strong><span style="color: #009e4c;">polar amino acid</span></strong></span></strong>, with a single methyl group (-CH<sub>3</sub>) as its <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Correct B. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">lysine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect MC <p>f4a4</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ff5e00;">aromatic amino acid</span></strong> with a <strong><span style="color: #6d108e;">side chain</span></strong> containing a phenol (-C<sub>6</sub>H<sub>6</sub>OH) group, derived from phenylalanine'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">glutamic acid</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">leucine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">tyrosine</span> Correct MC <p>f504</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'a <strong><span style="color: #ffa100;">non-polar branched chain amino acid</span></strong> with the shortest hydrophobic <strong><span style="color: #6d108e;">side chain</span></strong>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">asparagine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">histidine</span> Incorrect C. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">threonine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">valine</span> Correct MC <p>fcbf</p> <p>Which one of the following amino acids correspond to the description <span style='font-size: 1em;'><strong>'<table border="1" style="border: 1px lightgray solid;" cellpading="0" cellspacing="0" align="center"> <tr><!-- top atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=2 style="border: none;" align="center">H</td> <td style="border: none;"></td> </tr> <tr><!-- top vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- middle bonds atoms and lines --> <td rowspan=2 colspan=2 style="border: none;" align="center"><sup>–</sup>OOC</td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">C<sub>α</sub></td> <td style="font-size: 1px; border: none; border-bottom: 2px black solid;" width="20px"> </td> <td rowspan=2 colspan=2 style="border: none;" align="center">H</td> </tr> <tr><!-- left over middle bond lines --> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> <td style="font-size: 1px; border: none; border-top: 2px black solid;" width="20px"> </td> </tr> <tr><!-- bottom vertical bond lines --> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none;"></td> <td style="border: none; border-right: 2px black solid;"> </td> <td style="border: none; border-left: 2px black solid;"> </td> <td style="border: none;"></td> </tr> <tr><!-- bottom atoms --> <td style="border: none;"></td> <td style="border: none;"></td> <td colspan=4 style="border: none;" align="center">NH<sub>3</sub><sup>+</sup></td> <td style="border: none;"></td> </tr></table>'</strong></span>.</p> A. <span style="font-family: sans-serif; letter-spacing: 1px;">alanine</span> Incorrect B. <span style="font-family: sans-serif; letter-spacing: 1px;">glycine</span> Correct C. <span style="font-family: sans-serif; letter-spacing: 1px;">methionine</span> Incorrect D. <span style="font-family: sans-serif; letter-spacing: 1px;">phenylalanine</span> Incorrect E. <span style="font-family: sans-serif; letter-spacing: 1px;">proline</span> Incorrect