Which component makes each amino acid unique? amino group carboxyl group r group phosphate group

Its the R group.

Explanation:

Every amino acid has an amino group, a carboxylic acid group, and a R group which varies from one amino acid to another amino acid. The R group can also be referred as side chain. There are 20 amino acids and they are the building blocks of proteins.

option a and d is the correct answer

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