Wednesday, November 30, 2011

What is chromosome?

In the nucleus of each cell, the DNA molecule is packaged in to threat- like structures called chromosome. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell nucleus not even under microscope when the cell is not dividing. However the DNA that makes up chromosomes become more tightly packed during cell division is then visible under microscope.

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