The correct answer is option C.proteins break down into amino acids and this occurs in all organisms.
Proteins usually break down into amino acids, by the process of catabolism usually starts with the step of pepsin, which converts proteins into a polypeptide.
What causes proteins to break down into amino acids?
The enzymes cause proteins to break down into amino acids by the enzymes proteases.
Hence concluded that option C) A = protein; B = amino acids is the correct answer.
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