The structure in chromatin seen as beads-on string when viewed under electron microscope are called _______________.

Nucleotides

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Histone octamer

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Nucleosomes

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None of these

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Solution

The correct option is D None of these
Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin, thread-like stained (cultured) bodies seen in nucleus. The nucleosomes in chromatin are seen as beads-on-string structure when viewed under electron microscope.

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What are the structures called that give an appearance as ‘beads on a string’ in the chromosomes when viewed under an electron microscope?

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