Histone proteins are rich in :

Options

A. Alanine and glycine
B. Arginine and lysine
C. Histidine and serine
D. Tyrosine and cysteine

Answer

**Step-by-Step Solution:**

1. **Understanding Histone Proteins**: Histone proteins are a type of protein that plays a crucial role in the packaging of DNA within eukaryotic cells. They help in organizing DNA into a compact structure, allowing it to fit within the nucleus.

2. **Composition of Proteins**: Proteins are made up of amino acids. The specific sequence and composition of these amino acids determine the properties and functions of the protein.

3. **Characteristics of Histones**: Histones are known to be highly alkaline proteins. This means they have a high pH and contain a significant number of basic (positively charged) amino acids.

4. **Identifying Amino Acids in Histones**: The key amino acids that are abundant in histone proteins are lysine and arginine. Both of these amino acids are basic and contribute to the alkaline nature of histones.

5. **Conclusion**: Based on the information gathered, we can conclude that histone proteins are rich in lysine and arginine.

6. **Final Answer**: Therefore, the correct answer is that histone proteins are rich in lysine and arginine.

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