Question

multiple - choice question which of the following is not a function of proteins? build muscle use as antibodies function as enzymes source of energy

Explanation:

Proteins are essential for building muscle, functioning as antibodies to fight infections, and acting as enzymes to catalyze biochemical reactions. While proteins can be used as an energy source in extreme circumstances like starvation, it is not their primary or typical function. Carbohydrates and fats are the body's main energy - sources.

Answer:

source of energy