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Q.

The ratio of H1 and H3 proteins in chromatin is

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a

1 : 2

b

2 : 1

c

1 : 1

d

1 : 4

answer is A.

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Detailed Solution

The chromatin structure of DNA is formed by folding or wraping of DNA around the nucleosome

The nucleosome is made up of an octamer of 4 histone proteins in dimeric condition

So, H3 protein which also forms the nucleosome exists in dimeric state or two units

For every nucleosome there exists only one H1 protein present on the exterior clamping the nucleosome

Structure

Therefore, the ratio of H1 to H3 is 1:2   So, the correct answer is '1:2'.

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