Which of the following enzyme digests proteins in stomach?
(a) trypsin
(b) pepsin
(c) erepsin
(d) none of these

Options

A. trypsin
B. pepsin
C. erepsin
D. none of these

Explanation

To solve the question "Which of the following enzyme digests proteins in stomach?" we will analyze the options provided:

1. **Understanding the Stomach's Role in Digestion**: The stomach is a hollow organ located below the diaphragm on the left side of the abdominal cavity. It plays a crucial role in the digestive system.

2. **Gastric Glands**: The stomach contains gastric glands that secrete gastric juice, which is essential for digestion. These glands have different types of cells, including chief cells and parietal cells.

3. **Enzymes Produced**: Among the enzymes produced by the gastric glands, the chief cells secrete pepsinogen (an inactive form of pepsin) and renin. Pepsinogen is converted into pepsin in the acidic environment of the stomach.

4. **Function of Pepsin**: Pepsin is the enzyme responsible for digesting proteins in the stomach. It breaks down protein molecules into smaller peptides.

5. **Analyzing the Options**:
- (a) Trypsin: This enzyme is produced in the pancreas and acts in the small intestine, not the stomach.
- (b) Pepsin: This is the correct answer as it digests proteins in the stomach.
- (c) Erepsin: This enzyme acts in the small intestine and is involved in the final digestion of peptides into amino acids.
- (d) None of these: This option is incorrect since pepsin is indeed present.

6. **Conclusion**: The enzyme that digests proteins in the stomach is **pepsin**.

**Final Answer**: (b) pepsin

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