Question

what is one function of proteins in a cell?
a. proteins supply immediate energy.
b. proteins store genetic information.
c. proteins regulate chemical reactions.
d. proteins are stored for future energy use.

Explanation:

• Option A: Immediate energy is supplied by carbohydrates (like glucose), not proteins. So A is incorrect.
• Option B: Genetic information is stored in nucleic acids (DNA and RNA), not proteins. So B is incorrect.
• Option C: Many proteins act as enzymes, which are biological catalysts that regulate (speed up) chemical reactions in cells. This is a key function of proteins.
• Option D: Fats are mainly stored for future energy use, not proteins. Proteins are more for structural and functional roles (like enzymes, transport, etc.) rather than long - term energy storage.

Answer:

C. Proteins regulate chemical reactions.