Proteolytic enzymes do not corrode lining of alimentary canal as

Options

A. They are secreted in inactive form
B. Lining layer of alimentary canal does not contain protein
C. The enzymes are not capable of digestingo fat
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Proteolytic Enzymes**: Proteolytic enzymes are enzymes that break down proteins into smaller peptides or amino acids. They play a crucial role in the digestive process.

2. **Identifying the Question**: The question asks why proteolytic enzymes do not corrode the lining of the alimentary canal.

3. **Analyzing the Options**:
- **Option 1**: "They are secreted in the inactive form."
- **Option 2**: "The lining layer of the alimentary canal does not contain protein."
- **Option 3**: "The enzymes are not capable of digestion of fat."
- **Option 4**: "None of the above."

4. **Evaluating Option 2**: The lining of the alimentary canal is made up of epithelial tissue, which does contain proteins. Therefore, this statement is incorrect.

5. **Evaluating Option 3**: While it is true that proteolytic enzymes primarily digest proteins, this does not explain why they do not damage the lining of the canal. Thus, this statement is also incorrect.

6. **Evaluating Option 1**: Proteolytic enzymes are indeed secreted in an inactive form (such as pepsinogen, which is activated to pepsin in the stomach). This prevents them from digesting the proteins in the lining of the alimentary canal until they are activated by the presence of food. Therefore, this statement is correct.

7. **Conclusion**: The correct answer is that proteolytic enzymes do not corrode the lining of the alimentary canal because they are secreted in an inactive form.

**Final Answer**: They are secreted in the inactive form.

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