Amino Acids and Classification
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MCAT Chemical and Physical Foundations of Biological Systems › Amino Acids and Classification
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1
Which of the following amino acids are acidic?
I. Glutamate
II. Proline
III. Glycine
IV. Arginine
I only
CORRECT
I and IV
II and III
I, II and IV
Explanation
Glutamate (glutamic acid), is the only one of which that contain an acidic functional group (carboxylic acid). Arginine is basic while proline and glycine considered non-polar.