Enzyme pepsin acts on:
Correct answer: A. Option A
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Pepsin is a proteolytic enzyme, meaning it breaks down proteins. It functions in the acidic environment of the stomach, where the stomach lining secretes hydrochloric acid (HCl) to create an acidic environment (pH around 1-2). In this acidic environment, pepsinogen, the inactive precursor of pepsin, is secreted by the chief cells of the gastric glands. The acidic conditions in the stomach convert pepsinogen into its active form, pepsin. Pepsin then acts on dietary proteins, cleaving the peptide bonds between amino acids and breaking the proteins down into smaller peptides.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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