Histone which links the nucleosomes together is called:-

Options

A. `H_(1)`
B. `H_(2)A`
C. `H_(2)B`
D. `H_(4)`

Answer

To answer the question "Histone which links the nucleosomes together is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nucleosomes**:
- Nucleosomes are the fundamental units of chromatin, consisting of a segment of DNA wrapped around a core of histone proteins.

2. **Composition of Nucleosomes**:
- Each nucleosome is made up of an octamer of histones, which includes two copies of four different histone proteins: H2A, H2B, H3, and H4.

3. **Role of Histones**:
- Histones are positively charged proteins that interact with negatively charged DNA, facilitating the formation of nucleosomes.

4. **Linking Histone**:
- Among the histones, H1 is known as the linker histone. It binds to the nucleosome and helps in the compaction of the chromatin structure by linking adjacent nucleosomes together.

5. **Identifying the Correct Answer**:
- Given the options, H1 is the histone that links the nucleosomes together. The other histones (H2A, H2B, H3, and H4) are part of the nucleosome core and do not link nucleosomes.

### Conclusion:
- The correct answer is **H1 histone**.