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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
Describe the structure of a nucleosome.
Write a note on the packaging of DNA in prokaryotes.
In prokaryotes, the enzyme RNA polymerase recognizes the promoter by its ______.
A typical nucleosome "bead" is made up of ______.
The chromatin is packed to form a solenoid structure of ______ diameter.
Barr body in mammals represents ______.
Read the following and answer from given below:
The process of copying genetic information from the template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.
Monocistronic structural genes are found in which organisms?
In the eukaryotic cell cycle, cell fusion experiments show that:
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Nucleosomes are the repeating units of chromatin the part between adjacent nucleosomes is called ______ .
