## Answers

1. Answer - B

Nucleosome is the basic unit of chromosome. It consists of a double helix up to 147 base pairs around the octane of histone proteins. There are two set of histones - H2A, H2B , H3 and H4.

2. Answer - B

Histone H1 plays an important role in the stabilizing of chromatin fibre by binding with 20-80 base pairs long "linker DNA".

3.

Answer - A

Euchromatin participates in active transcription so a mRNA is formed from DNA.

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