Assertion : DNA is associated with proteins.
Reason : DNA binds around histone proteins that form a pool and the entire structure is called a nucleosome.

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "DNA is associated with proteins." This is true because DNA does interact with various proteins in the cell. These proteins play crucial roles in processes such as DNA replication, repair, and transcription.

2. **Understanding the Reason**: The reason provided is that "DNA binds around histone proteins that form a pool and the entire structure is called a nucleosome." This is also true. Histone proteins are a specific type of protein that DNA wraps around to form a structure known as a nucleosome, which is essential for the packaging of DNA into chromosomes.

3. **Analyzing the Relationship**: We need to determine if the reason correctly explains the assertion. Since the assertion is about DNA being associated with proteins in general, and the reason specifically describes how DNA interacts with histone proteins to form nucleosomes, it does indeed provide a valid explanation for the assertion.

4. **Conclusion**: Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer**: Both assertion and reason are true, and the reason is the correct explanation of the assertion.

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