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Question
Explain the role of histones in forming a nucleosome.
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Solution
(i) Histones are positively charged basic proteins which are organised to form a unit of eight molecules called histone octamer.
(ii) Histones are rich in the basic amino acids residues lysines and arginines which carry positive charges in their side chains.
(iii) The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called nucleosome.
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