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Question
Histone proteins are rich in
Histone proteins are rich in
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Solution
The correct option is B Arginine and lysine
In eukaryotic cell, the DNA is wound around an octamer of histone core to form bead like structures called nucleosomes. The octamer core of histone proteins is made up of two units each of H2A, H2B, H3 and H4. Another histone protein H1, is present at the point of entry and exit of DNA from nucleosome. The histone proteins are rich in basic amino acids lysine and arginine which gives a positive charge to them. The positive charge of histone proteins helps in winding of negatively charged DNA around them.Thus, the correct answer is option B.
In eukaryotic cell, the DNA is wound around an octamer of histone core to form bead like structures called nucleosomes. The octamer core of histone proteins is made up of two units each of H2A, H2B, H3 and H4. Another histone protein H1, is present at the point of entry and exit of DNA from nucleosome. The histone proteins are rich in basic amino acids lysine and arginine which gives a positive charge to them. The positive charge of histone proteins helps in winding of negatively charged DNA around them.
Thus, the correct answer is option B.
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