Some proteolytic enzymes are

Options

A. Trypsin, Erepsin, Pepsin
B. Amylase, Lipase, Zymase
C. Ampylopsin, Steapsin, Ptyalin
D. Urease, Dehydrogenase, Zymase

Answer

To answer the question about proteolytic enzymes, we will identify some key enzymes that fall under this category and explain their functions.

### Step-by-Step Solution:

1. **Definition of Proteolytic Enzymes**:
- Proteolytic enzymes, also known as proteases or proteinases, are enzymes that break down proteins into smaller peptides or amino acids through the process of hydrolysis.

2. **Identifying Proteolytic Enzymes**:
- Among the options provided, we need to identify which enzymes are classified as proteolytic enzymes. The correct answer is A: Trypsin, Erypsin, and Pepsin.

3. **Function of Trypsin**:
- Trypsin is produced in the pancreas and functions in the small intestine. It converts proteins and peptides into smaller peptides, specifically dipeptides, by cleaving peptide bonds.

4. **Function of Erypsin**:
- Erypsin (also known as enterokinase) is a mixture of proteolytic enzymes that further breaks down peptones into amino acids in the small intestine. It plays a crucial role in protein digestion.

5. **Function of Pepsin**:
- Pepsin is a gastric enzyme that is active in the stomach. It converts proteins into smaller peptides (peptones and proteoses) in the acidic environment of the stomach.

6. **Conclusion**:
- Therefore, the correct answer to the question "Some proteolytic enzymes are" is A: Trypsin, Erypsin, and Pepsin.