Assertion : Enzymes lower the activation energy of the reactant molecule to make its transition into product easier.
Reason : Enzymes are highly substrate specific

Options

A. if both are true with reason being correct explanation
B. both are true but reason is not correct explanation
C. assertion is true but reason is wrong
D. and both are wrong

Answer

To analyze the assertion and reason provided in the question, let's break it down step by step.

### Step 1: Understanding the Assertion
**Assertion:** Enzymes lower the activation energy of the reactant molecule to make its transition into product easier.

- **Explanation:** Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur. This means that they make it easier for reactant molecules to convert into products by facilitating the transition state.

### Step 2: Understanding the Reason
**Reason:** Enzymes are highly substrate specific.

- **Explanation:** Enzymes are designed to interact with specific substrates (the reactants in the reaction). This specificity ensures that enzymes catalyze only particular reactions, which is crucial for the regulation of metabolic pathways in living organisms.

### Step 3: Evaluating the Relationship Between Assertion and Reason
- While both the assertion and reason are true, the reason does not explain why enzymes lower the activation energy. The assertion focuses on the catalytic function of enzymes, while the reason emphasizes their specificity.

### Conclusion
- **Final Answer:** Both the assertion and reason are true, but the reason is not the correct explanation for the assertion.