Which one of the following is the matching pair of digestive enzyme and substrate

Options

A. Rennin–Protein
B. Amylase–Lactose
C. Trypsin–Starch
D. Invertase–Maltose

Explanation

To solve the question regarding the matching pair of digestive enzyme and substrate, we will analyze each option provided and determine the correct pair.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which enzyme corresponds correctly to its substrate among the given options.

2. **List the Options**:
- A. Renin, Protein
- B. Amylase, Lactose
- C. Trypsin, Starch
- D. Invertase, Maltose

3. **Analyze Each Option**:
- **Option A: Renin, Protein**:
- Renin is an enzyme that specifically digests milk protein (casein). This is a correct match.

- **Option B: Amylase, Lactose**:
- Amylase is an enzyme that breaks down starch into sugars, not lactose. Lactose is broken down by lactase. This is incorrect.

- **Option C: Trypsin, Starch**:
- Trypsin is an enzyme that digests proteins, not starch. Starch is broken down by amylase. This is incorrect.

- **Option D: Invertase, Maltose**:
- Invertase is an enzyme that converts sucrose into glucose and fructose, not maltose. Maltose is broken down by maltase. This is incorrect.

4. **Conclusion**: The only correct matching pair of digestive enzyme and substrate is **Renin with Protein** (Option A).

### Final Answer:
The matching pair of digestive enzyme and substrate is **Renin with Protein**.

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