MediumNEET 2026
+4 / -1
Which of the following statements are correct with reference to packaging of DNA helix?
A
Histones are organized to form a unit of eight molecules called histone octamer.
B
Histones are positively charged basic proteins.
C
Histones are rich in the basic amino acid residues lysine and arginine.
D
The positively charged DNA is wrapped around the histone octamer to form nucleosomes.
Explanation
Histone proteins form an octamer, are basic and positively charged due to lysine and arginine residues, and higher-order chromatin organization requires non-histone chromosomal proteins. DNA is negatively charged, not positively charged, making statement D incorrect.
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