Chapter: Molecular Basis of Inheritance· Biology

The number of base pairs present around a histone octamer of nucleosome is _____.

Q.1 (i) The number of base pairs present around a histone octamer of nucleosome is _____.

A. 200

B. 146

C. 54

D. 20

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Answer: (b) 146

In a nucleosome, about 146 bp of DNA are wrapped (about 1.75 turns) around the histone octamer (two each of H2A, H2B, H3 and H4). Linker DNA (about 54 bp) joins adjacent nucleosomes, so one nucleosome with its linker has about 200 bp.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

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The number of base pairs present around a histone octamer of nucleosome is _____.

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