IGNOU LSE 3 2018 - With the help of clear and labelled diagrams describe the composition

Question

With the help of clear and labelled diagrams describe the composition and
structure of the nucleosome.

23 Jan 2018

Answer :

Word Count : 542

Nucleosomes are the building blocks which make up chromosomes. They consist of a segment of DNA wound around a histone protein core.

First, DNA and a protein make up chromatin. Then the chromatin is packed up into nucleosomes. Nucleosomes are then packaged up to make a chromosome. The packages do three things: the chromosomes function in cell division; the very long DNA is wrapped up in a shorter package; and the proteins regulate the gene action in cells.

Nucleosomes form the basic repeating units of eukaryotic chromatin. This packs the large eukaryotic genomes into the nucleus and allows it to be controlled.

In mammalian cells about two metres of linear DNA have to be

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