Identify a protein-digesting enzyme.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. Pepsin.
- Pepsin is a stomach enzyme that serves to digest proteins found in ingested food.
- Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen.
- Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin