Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

D

Our body doesn't use proteins to make amino acids.

Explanation:

Amino acids are simple organic molecules made up of a carboxyl group (made up of carbon and oxygen atoms)  and an amino group. These molecules join together to form long polypeptide chains which make up proteins.

Proteins are large complex molecules used to produce hormones, hemoglobin, enzymes and they help to repair the muscles. They are not used to make amino acids.