Q.

Histones are rich in

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a

alanine and glycine

b

histidine and serine

c

cysteine and tyrosine

d

lysine and arginine

answer is B.

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Detailed Solution

Histones are positively charged, basic proteins, enriched in the amino acids arginine and lysine. Thus, being basic, histones bind tightly to negatively charged  DNA .

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