Question

a student is comparing the different macromolecule types for a biology class. the student described the structure of the molecules but then must complete the table for the functions of these molecules. which description accurately compares the functions of carbohydrates and proteins and can be used to complete the table? a carbohydrates and proteins can both be used for energy by the cell. b carbohydrates and proteins can both be used as enzymes by the cell. c carbohydrates and proteins can both be used for signaling by the cell. d carbohydrates and proteins share no common functions since their structures are different

Explanation:

Carbohydrates are primary energy sources (e.g., glucose). Proteins can also be used for energy when carbs/fats are insufficient, though this is not their main role. Enzymes are proteins, not carbs. Signaling molecules include some proteins (hormones) but not typical carbs. They share energy use as a function.

Answer:

A. Carbohydrates and proteins can both be used for energy by the cell.