Question:
The length of DNA helix in a typical nucleosome is
The length of DNA helix in a typical nucleosome is
Updated On: Apr 9, 2025
- 200 bp
- 1000 bp
- $3.2 \times 10^6 $ bp
- $ 6.6 \times 10^9$ bp
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The Correct Option is A
Approach Solution - 1
A nucleosome is the basic structural unit of chromatin, consisting of DNA wrapped around histone proteins.
The length of DNA in a nucleosome is ~146 base pairs (bp) tightly bound to the histone core, with an additional ~54 bp as linker DNA, totaling ~200 bp per nucleosome.
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Approach Solution -2
- Nucleosome core: ~146 bp wrapped around histone octamer.
- Linker DNA: ~54 bp between nucleosomes.
- Total: ~200 bp per nucleosome unit.
The correct answer is (A) 200 bp.
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