Each amino acid differs from another in the
A) number of central carbon atoms.
B) size of the amino group.
C) number of carboxyl groups.
D) nature of the side chain.
E) number of peptide bonds in the molecule.

Question

Quizplus · Accepted Answer

Amino acids are distinguished from each other by the nature of their side chain or R group. The side chain can be a simple hydrogen atom, a more complex methyl group, or a polar, charged, or aromatic group. The variation in side chains gives each amino acid its unique chemical, physical, and biological properties.

Each Amino Acid Differs from Another in the