Linker DNA present in between :–

Options

A. Two nucleosome
B. Two chromatid
C. Two solenoid
D. Chromomere

Answer

### Step-by-Step Solution:

1. **Understanding Linker DNA**: Linker DNA is a segment of DNA that connects two nucleosomes. Nucleosomes are the basic units of DNA packaging in eukaryotic cells, consisting of a segment of DNA wound around a core of histone proteins.

2. **Nucleosome Structure**: Each nucleosome consists of an octamer of histone proteins (two copies each of histone H2A, H2B, H3, and H4) around which approximately 147 base pairs of DNA are wrapped. The DNA between two nucleosomes is referred to as linker DNA.

3. **Identifying the Correct Option**:
- The question asks what linker DNA is present between.
- The correct answer is "two nucleosomes" because linker DNA connects these nucleosomes.

4. **Analyzing Other Options**:
- The second option mentions chromatin, which is a complex of DNA and protein but does not specifically refer to the connection between nucleosomes.
- The third option mentions solenoid, which is a higher-order structure of chromatin and not directly related to linker DNA.
- The fourth option, chromomere, refers to a localized region of chromatin and is also incorrect in this context.

5. **Conclusion**: The correct answer is that linker DNA is present between two nucleosomes.

### Final Answer:
**Linker DNA is present between two nucleosomes.**

---