Histone proteins are

Options

A. basic , negatively charged
B. basic , positively charged
C. acidic, positively charged
D. acidic, negatively charged.

Explanation

**Step-by-Step Solution:**

1. **Understanding Histone Proteins:**
- Histone proteins are a group of proteins that play a crucial role in the organization of DNA in eukaryotic cells. They are essential for the packaging of DNA into a compact structure known as chromatin.

2. **Charge of Histone Proteins:**
- Histones are characterized by their positive charge. This positive charge is due to the presence of basic amino acids, which include lysine and arginine. These amino acids have side chains that are positively charged at physiological pH.

3. **Types of Histone Proteins:**
- There are five main types of histone proteins: H1, H2A, H2B, H3, and H4. Among these, H2A, H2B, H3, and H4 form a core structure known as the histone octamer.

4. **Formation of Nucleosomes:**
- The histone octamer serves as a spool around which DNA is wound, forming a structure called a nucleosome. This is the fundamental unit of chromatin. The DNA wraps around the histone octamer, and the linker DNA connects adjacent nucleosomes.

5. **Conclusion:**
- Given the characteristics of histone proteins, we can conclude that they are positively charged basic proteins. Thus, the correct answer to the question is that histone proteins are basic and positively charged.

**Final Answer:**
Histone proteins are positively charged basic proteins.

---