Assertion : Restriction enzymes cut the strand of DNA to produce sticky ends.
Reason : In this process, there is net gain of twenty four molcules of ATP.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Restriction enzymes cut the strand of DNA to produce sticky ends."
- Restriction enzymes, also known as endonucleases, do indeed cut DNA at specific sequences called recognition sites. However, they can produce either sticky ends or blunt ends depending on the specific enzyme used.
- For example, the enzyme EcoRI produces sticky ends, while another enzyme like EcoRV produces blunt ends. Therefore, the assertion is **not universally true** as it implies that all restriction enzymes produce sticky ends.

2. **Understanding the Reason**:
- The reason states that "In this process, there is a net gain of twenty-four molecules of ATP."
- The process of cutting DNA by restriction enzymes does not involve ATP generation. The action of restriction enzymes is a cleavage of DNA and does not inherently produce or consume ATP in a way that results in a net gain. Thus, this statement is also **false**.

3. **Conclusion**:
- Since both the assertion and the reason are false, the correct answer to the question is that both the assertion and reason are false.

### Final Answer:
Both the assertion and reason are false.