Multiple choice

Pepsin in the stomach plays what role in digestion?

  1. Breaks down lipids into fatty acids

  2. Breaks down lipids into amino acids

  3. Breaks down proteins into fatty acids

  4. Breaks down proteins into amino acids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pepsin is an endopeptidase secreted in the stomach that hydrolyzes proteins into smaller polypeptides and eventually amino acids. While pepsin primarily cleaves proteins into shorter peptide chains rather than individual amino acids, option D is the only option that correctly identifies proteins as the substrate.

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