Amino acids are the monomers of proteins. each amino acid consists of a carbon atom bound to a hydrogen atom, an amino group (-nh2), a carboxyl group (-cooh), and a variable r group. which functional group acts as an acid? a) amino group b) carboxyl group c) hydroxyl group d) phosphate group

In amino acids, the carboxyl group acts as an acid.

Option B

Explanation:

The molecular formula of the carboxyl group is -COOH. It is composed of one carbon atom bonded with oxygen atom and hydroxyl group.

During ionization process, it leads to the formation of two ions namely a positive ion called , whereas a negative ion called . Due to the formation of ions, which is nothing but a proton, the carboxyl group present in the amino acid act as an acid.