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Question

The X-shaped structure found in the nucleus by coiling of DNA before cell division is called _____ .

A
chromosome
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B
RNA
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C
nucleoid
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D
None of the above
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Solution

The correct option is A chromosome

A chromosome is the X-shaped colour body formed after coiling of negatively charged DNA around positively charged histones proteins in eukaryotes. These appear right before cell division during the interphase.

RNA is ribonucleic acid and is a genetic material comparatively less stable than DNA. It occurs as genetic material in some viruses.

The DNA is coiled and freely floating in the cytoplasm of prokaryotes. This region is called a nucleoid.


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