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

Base pairs

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Nucleosomes

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Genes

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Nucleotides

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Solution

The correct option is B
Nucleosomes

Nucleosomes are particles present on the chromatin fibre which give a beaded appearance to the chromatin.

A nucleosome consists of a DNA which wraps a histone octamer.

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What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under an electron microscope?

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