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Question

The chromatin material which takes darker stain in interphase is called as

A
Euchromatin
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B
Heterochromatin
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C
Primary constriction
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D
Satellite body
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Solution

The correct option is B Heterochromatin
The chromatin material which takes darker stain in interphase is called Heterochromatin. Heterochromatin is a tightly packed form of DNA, which comes in different varieties. These varieties lie on a continuum between the two extremes of constitutive and facultative heterochromatin. Both play a role in the expression of genes. Heterochromatin has been associated with several functions, from gene regulation to the protection of the integrity of chromosomes; some of these roles can be attributed to the dense packing of DNA, which makes it less accessible to protein factors that usually bind DNA or its associated factors.

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