2. when people eat foods high in proteins, such as meat, eggs, and cheese, the body breaks down the
proteins into smaller molecules. what is supplied to cells when the body breaks down proteins?
a amino acids
b. nucleic acids
c. phospholipids
d. carbohydrates

A. amino acids

Explanation:

Protein in our diets comes from both animal and vegetable sources. ... The digestive system breaks all proteins down into their amino acids so that they can enter the bloodstream. Cells then use the amino acids as building blocks to build enzymes and structural proteins.

hope this helps

b is the best answer for this question.