The main enzymes present in the gastric juice are

Options

A. Trypsin, pepsin and lipase
B. Pepsin, amylase and trypsin
C. Pepsin, rennin and carboxypeptidase
D. Pepsin, lipase and rennin

Answer

**Step-by-Step Text Solution:**

1. **Identify the Question**: The question asks for the main enzymes present in gastric juice.

2. **Understand Gastric Juice Composition**: Gastric juice is produced in the stomach and is highly acidic, with a pH range of approximately 0.9 to 1.5 due to the presence of hydrochloric acid (HCl).

3. **List the Main Enzymes**: The main enzymes found in gastric juice include:
- **Pepsin**: Secreted as an inactive form called pepsinogen, which is activated by HCl. Pepsin is crucial for protein digestion, breaking down proteins into smaller peptides or amino acids.
- **Lipase**: An enzyme that aids in the digestion of lipids (fats).
- **Renin**: An enzyme that helps in the digestion of milk proteins, particularly casein, by curdling milk.

4. **Eliminate Incorrect Options**:
- **Trypsin**: This enzyme is not present in gastric juice; it is secreted by the pancreas.
- **Carboxypeptidase**: Also a pancreatic enzyme, not found in gastric juice.
- **Amylase**: Found in saliva, not in gastric juice.

5. **Conclude the Answer**: The main enzymes present in gastric juice are **pepsin, lipase, and renin**.

**Final Answer**: The main enzymes present in gastric juice are pepsin, lipase, and renin.

---