Question

Which of the following enzymes is secreted by the stomach and helps in protein digestion?

• A. Amylase
• B. Pepsin
• C. Lipase
• D. Trypsin

Hint:

Pepsin = Protein digestion in stomach. Amylase = Carbohydrates, Lipase = Fats, Trypsin = Protein (in small intestine).

Answer 1

The Correct Option is B

The enzyme secreted by the stomach that aids in protein digestion is Pepsin. Pepsin is produced in the gastric lining as an inactive form called pepsinogen. Once pepsinogen is exposed to the acidic environment in the stomach, it gets converted into active pepsin. This active enzyme then breaks down proteins into smaller peptides, facilitating further digestion and absorption in the small intestine. The other enzymes listed are not involved in this initial stage of protein digestion:

• Amylase is involved in carbohydrate digestion and is secreted by the salivary glands and pancreas.
• Lipase aids in fat digestion and is secreted by the pancreas into the small intestine.
• Trypsin is another protein-digesting enzyme, but it is secreted by the pancreas and acts in the small intestine, not the stomach.