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Question

The thread-like uncoiled structures in the nucleus of a resting cell are

A
chromosomes
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B
chromatophores
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C
chromatids
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D
chromatin
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Solution

The correct option is D chromatin
Chromatin refers to the loose and extended form of nucleoproteins lying in the nucleus. Chromatin can be easily visualised using certain stains at the resting phase of the cell.
As the cell prepares to divide, the chromatin fibres condense and coil tightly to form chromosomes. A chromatid is one of the two identical halves of a chromosome that has duplicated. Each half is called a chromatid. Since both halves in a chromosome are the same as they have duplicated from the parent DNA, they both are also called sister chromatids.

Chromatophores are membrane-associated structures that contain pigments in prokaryotes and does the function of chloroplasts in them as well as provide them colouration.


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