Nature of histone protein is :-

Options

A. Basic and positive charged
B. Acidic and positive charged
C. Acidic and negative charged
D. Basic and negative charged

Answer

To determine the nature of histone proteins, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Histone Proteins**:
- Histones are proteins that help package DNA into a compact, organized structure called chromatin in eukaryotic cells.

2. **Identify the Composition of Histones**:
- Histones are composed of basic amino acids, primarily lysine and arginine. These amino acids are known for their positive charge.

3. **Analyze the Charge of DNA**:
- DNA is negatively charged due to its phosphate backbone. This negative charge is crucial for the interaction between DNA and histones.

4. **Determine the Interaction**:
- The positive charge of histone proteins allows them to bind effectively to the negatively charged DNA, facilitating the winding of DNA around the histone octamer to form nucleosomes.

5. **Conclude the Nature of Histone Proteins**:
- Since histones are rich in basic amino acids (lysine and arginine) and carry a positive charge, we conclude that the nature of histone proteins is "basic and positive charge."

### Final Answer:
The nature of histone protein is **basic and positive charge**.

---