One solenoid composed of:

Options

A. 8-nucleosome
B. 6-nucleosome
C. 10-nucleosome
D. 16-nucleosome

Answer

To solve the question regarding the composition of a solenoid in terms of nucleosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nucleosomes**:
- Nucleosomes are the basic units of DNA packaging in eukaryotic cells. Each nucleosome consists of a segment of DNA wrapped around a core of histone proteins.

2. **Structure of Solenoid**:
- A solenoid is a higher-order structure formed by the coiling of nucleosomes. It is characterized by the stacking of nucleosomes connected by linker DNA.

3. **Analyzing the Given Nucleosome Counts**:
- The question provides four different counts of nucleosomes: 8, 6, 10, and 16. We need to determine which of these counts corresponds to a single solenoid.

4. **Identifying the Correct Count**:
- In the context of the solenoid structure, it is known that a typical solenoid formation contains about 6 nucleosomes per turn. This is a key characteristic of the solenoid structure.

5. **Conclusion**:
- Based on the analysis, the correct answer is that one solenoid is composed of **6 nucleosomes**.