Insulating the body is not a function of the protein.
Answer: Option A
Explanation:
The body is insulated with the help of protein, therefore, it is not a function of the protein. Protein makes the structure of the cell as the backbone. Protein specializes itself in structure to function as the enzymes.
They also serve as the secretion or production of the hormone which led to cell communication. Enzymes give the metabolic process and signaling of the cell are all function of the protein.