Identify the correct set which shows name of the enzymes from where it is secreted and substrafe upon which it acts

Options

A. pepsin-stomach-protein
B. ptyalin-intestine-maltose
C. chymotrypsin-salivary gland-Jactose
D. ptyalin-pancreas-lipid

Answer

To solve the question regarding the correct set of enzyme, secretion site, and substrate, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: We need to identify the correct set that includes the name of an enzyme, where it is secreted, and the substrate it acts upon.

2. **Analyzing Option A**:
- **Enzyme**: Pepsin
- **Where Secreted**: Stomach
- **Substrate**: Proteins
- **Explanation**: Pepsin is secreted in the stomach as pepsinogen (inactive form) and is activated by hydrochloric acid (HCl). It acts on proteins, breaking them down into smaller peptides.
- **Conclusion**: This option is correct.

3. **Analyzing Option B**:
- **Enzyme**: Salivary Amylase (also referred to as Tylenol)
- **Where Secreted**: Buccal cavity (mouth)
- **Substrate**: Starch
- **Explanation**: Salivary amylase is indeed secreted in the buccal cavity and acts on starch, converting it into maltose. However, the name "Tylenol" is incorrect as it refers to a pain reliever (acetaminophen) and not an enzyme. Therefore, this option is incorrect.

4. **Analyzing Option C**:
- **Enzyme**: Chemotrypsin
- **Where Secreted**: Salivary glands (incorrect)
- **Substrate**: Lactose (incorrect)
- **Explanation**: Chemotrypsin is produced in the pancreas and acts on proteins, not lactose. This option is incorrect due to both the secretion site and substrate being wrong.

5. **Analyzing Option D**:
- **Enzyme**: Salivary Amylase (Tylenol)
- **Where Secreted**: Pancreas (incorrect)
- **Substrate**: Lipid (incorrect)
- **Explanation**: This option incorrectly states that salivary amylase is secreted from the pancreas and acts on lipids. Salivary amylase is secreted from the salivary glands and acts on starch. Therefore, this option is also incorrect.

### Final Conclusion:
The correct answer is **Option A**: Pepsin, secreted in the stomach, acting on proteins.