Assertion : Competitive inhibitor is also called as substrate analogue.
Reason : It resembles the enzymes in structure.

Options

A. Both 1 and 2 are correct
B. 1 is correct and 2 is incorrect
C. 1 is incorrect and 2 is correct
D. Both are incorrect.

Answer

To analyze the given assertion and reason, we will break down the statements step by step.

### Step 1: Understanding the Assertion
- **Assertion**: "Competitive inhibitor is also called a substrate analogue."
- A competitive inhibitor is a molecule that resembles the substrate of an enzyme and competes with the substrate for binding to the active site of the enzyme. This means that the assertion is true because competitive inhibitors are indeed referred to as substrate analogues due to their structural similarity to the substrate.

### Step 2: Understanding the Reason
- **Reason**: "It resembles the enzymes in structure."
- The reason states that competitive inhibitors resemble enzymes in structure. However, this is incorrect. Competitive inhibitors resemble the substrate, not the enzyme. They compete with the substrate for the active site of the enzyme, but they do not resemble the enzyme itself.

### Step 3: Conclusion
- The assertion is true, but the reason is false. Therefore, the correct interpretation is that the assertion stands alone as correct, while the reason does not support it.

### Final Answer
- The assertion is correct, and the reason is incorrect. Thus, the correct option is that the assertion is true, and the reason is false.

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