Number of `H_1` proteins associated with a 10 nucleosomes in chromatin fibre is

Options

A. 9
B. 10
C. 11
D. 12

Answer

To determine the number of H1 proteins associated with 10 nucleosomes in chromatin fiber, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Nucleosomes**: A nucleosome is the basic unit of chromatin, consisting of a segment of DNA wrapped around a core of histone proteins. Each nucleosome typically contains a core of 8 histone proteins (2 copies each of H2A, H2B, H3, and H4).

2. **Identify H1 Protein**: H1 is a type of histone protein that is not part of the nucleosome core but is associated with the linker DNA between nucleosomes. It helps in the compaction of chromatin.

3. **Count Nucleosomes**: In this question, we are given that there are 10 nucleosomes.

4. **Determine H1 Protein Association**: Each nucleosome is generally associated with one H1 protein. Therefore, for 10 nucleosomes, we would expect there to be 10 H1 proteins.

5. **Conclusion**: The number of H1 proteins associated with 10 nucleosomes is 10.

### Final Answer:
The number of H1 proteins associated with 10 nucleosomes in chromatin fiber is **10**.

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