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प्रश्न
What is the diameter of the nucleosome fibre (beads-on-string structure)?
पर्याय
Approximately 300 nanometres
Approximately 10 nanometres
Approximately 2 nanometres
Approximately 30 nanometres
MCQ
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उत्तर
The nucleosome fibre, often visualized as a 'beads-on-a-string' structure in electron microscopy, has a diameter of approximately 10 nanometres. This represents the first level of higher-order chromatin organisation beyond the DNA double helix (~2 nm) and is the fundamental repeating unit visible at this magnification.
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