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Question

Nucleosome contains
$H_{2} A, H_{2} B, H_{3}, H_{4}$
$H_{3}, H_{4}$
$H_{2} A, H_{2} B, H_{3}$
$H_{1}, H_{2} A, H_{2} B, H_{3}$

A

H_{2} A, H_{2} B, H_{3}, H_{4}

B

H_{3}, H_{4}

C

H_{2} A, H_{2} B, H_{3}

D

H_{1}, H_{2} A, H_{2} B, H_{3}

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Solution

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Nucleosomes can be defined as structures with a basic unit of DNA packaging which consists of a segment of DNA wrapped in sequence around eight histone protein core.
Histones are small proteins which have a high amount of basic amino acids (arginine and lysine).
The segment of DNA wrapped around a core of 8 histone proteins called octamer contains two each of histones H2A, H2B, H3, and H4.
So, the correct answer is 'H2A, H2B, H3,H4'.

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