MCAT Physical › Amino Acids and Classification
Which of the following amino acids are acidic?
I. Glutamate
II. Proline
III. Glycine
IV. Arginine
I only
I and IV
II and III
I, II and IV
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.