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प्रश्न
Explain the formation of a nucleosome.
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उत्तर
Komberg proposed a model for the nucleosome, in which 2 molecules of the four histone proteins H2A, H2B, H3, and H4 are organized to form a unit of eight molecules called histone octamere.
The negatively charged DNA is wrapped around the positively charged histone octamere to form a structure called a nucleosome. A typical nucleosome contains 200 bp of DNA helix. The histone octameres are in close contact and DNA is coiled on the outside of the nucleosome.
Nucleosome
संबंधित प्रश्न
How are the following formed and involved in DNA packaging in a nucleus of a cell?
(ii) Nucleosome
(iii) Chromatin
Differentiate between Euchromatin and Heterochromatin.
Name the transcriptionally active region of chromatin in a nucleus.
Which one of the following histone molecule is NOT double in one nucleosome?
Telomere has a unique property of __________.
Histones are rich in ______.
Plasmid has been used as vector because ______.
Which one of the following statements about Histones is wrong?
Histones are best characterised as:
In the prokaryotic DNA compaction pathway, what is the diameter of relaxed circular DNA?
