Choose the correct pair

Options

A. Rennin - Casein
B. Protein - Amylase
C. Carbohydrate - Lipase
D. Maltase - Lactose

Answer

To solve the question "Choose the correct pair," we need to analyze the options provided and determine which pair represents a correct enzyme-substrate relationship.

### Step-by-Step Solution:

1. **Analyze the First Option: Renin and Casein**
- Renin is an enzyme secreted by the chief cells in the stomach.
- It is initially in the form of pro-renin and is activated by hydrochloric acid.
- Renin's primary function is to coagulate milk protein, which is casein.
- **Conclusion**: This is a correct pair since renin acts on casein.

2. **Analyze the Second Option: Protein and Amylase**
- Amylase is an enzyme that digests starch, converting it into disaccharides.
- It is secreted by the salivary glands and pancreas.
- However, amylase does not act on proteins; it specifically targets carbohydrates (starch).
- **Conclusion**: This is an incorrect pair since amylase does not digest protein.

3. **Analyze the Third Option: Carbohydrate and Lipase**
- Lipase is an enzyme that breaks down fats into fatty acids and glycerol.
- Carbohydrates are not the substrate for lipase; they are digested by enzymes like amylase.
- **Conclusion**: This is also an incorrect pair since lipase does not act on carbohydrates.

4. **Final Conclusion**:
- After analyzing all options, the only correct pair is **Renin and Casein**.

### Answer:
The correct pair is **Renin and Casein**.

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