Question:
The positively charged proteins around which DNA is wrapped in eukaryotic chromosome are
The positively charged proteins around which DNA is wrapped in eukaryotic chromosome are
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Histones:
- Positively charged (lysine, arginine).
- DNA is negatively charged.
- Nucleosomes: DNA wrapped around histones.
- Positively charged (lysine, arginine).
- DNA is negatively charged.
- Nucleosomes: DNA wrapped around histones.
Updated On: Sep 1, 2026
- Glycoproteins
- Histones
- Non-histones
- Metalloproteins
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of chromatin structure.
Step 2: Detailed Explanation:
Histones are positively charged proteins around which DNA is wrapped.
They are rich in basic amino acids (lysine, arginine).
This positive charge allows them to bind to the negatively charged DNA.
Histones form nucleosomes, the basic unit of chromatin.
Glycoproteins (A): Proteins with carbohydrate chains.
Non-histones (C): Other proteins in chromatin.
Metalloproteins (D): Proteins containing metal ions.
Thus, histones are the proteins around which DNA is wrapped.
Step 3: Final Answer:
Thus, histones are the positively charged proteins, which corresponds to option (B).
[0.5cm]
This question tests knowledge of chromatin structure.
Step 2: Detailed Explanation:
Histones are positively charged proteins around which DNA is wrapped.
They are rich in basic amino acids (lysine, arginine).
This positive charge allows them to bind to the negatively charged DNA.
Histones form nucleosomes, the basic unit of chromatin.
Glycoproteins (A): Proteins with carbohydrate chains.
Non-histones (C): Other proteins in chromatin.
Metalloproteins (D): Proteins containing metal ions.
Thus, histones are the proteins around which DNA is wrapped.
Step 3: Final Answer:
Thus, histones are the positively charged proteins, which corresponds to option (B).
[0.5cm]
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