Which of the following is not a function of protein? A. Helps build and maintain muscles.
O B. Supplies the body with energy.
c. Helps fight off infection.
O D. Helps keep the body warm.

The statement that describes what is not a function of proteins  is helps keep the body warm (option D).

Explanation:

Proteins are biological macromolecules that perform functions related to tissue construction and organic function.

Among the functions of proteins is not to help keep the body warm, a function that is performed by lipids. The most relevant functions of proteins are to form the sustaining tissue of the organism, participate in the structure of the cellular membranes, act in the metabolic reactions, in their form of enzymes, and to defend the organism as antibodies.

The other options are functions performed by proteins:

   A. Helps build and maintain muscles, contributing to the construction of tissues..

    B. Supplies the body with energy.  Proteins are an alternative source of energy, in case the other energy substrates are exhausted or when the body needs it.

    C. Helps fight off infection.  Antibodies are formed from proteins, in charge of attacking harmful agents for the organism.

with out the ancient ppl we wouldnt have medicine beacuse they taught us.