Which component makes each amino acid unique? Amino group
Carboxyl group
R group
Phosphate group

The best answer is R group. An R - group is a chemical group or side chain that is found attached to the central carbon in amino acids

Explanation:

The side groups are what make each amino acid different from the others. Of the 20 side groups used to make proteins, there are two main groups: polar and non-polar. These names refer to the way the side groups, sometimes called "R" groups, interact with the environment.

Explanation:

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