Q.

 Which of the following statements about nucleosome is true?

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a

It’s octomer is organised with 8 types of histones

b

It is a unit of heredity

c

It’s organization is universal in the genetical material of all living organisms

d

It’s DNA contains 200bp

answer is D.

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Detailed Solution

Histones are organised to form a unit of eight molecules called histone octamer. 

Each octamer is made of four types of proteins two each.

The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called nucleosome 

 A typical nucleosome contains 200 bp of DNA helix.

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 Which of the following statements about nucleosome is true?