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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
The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is _______________.
In an octamer of the nucleosome, core DNA consists of ______ base pairs.
Barr body in mammals represents ______.
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called ______.
Read the following and answer from given below:
The translation is the process of polymerization of amino acids to form a polypeptide. The order and sequence of amino acids are defined by the sequence bases in the mRNA. The amino acids are joined by a bond called a peptide bond. The ribosome is the site of protein synthesis.
During translation, how many initiation factors are required in eukaryotes for initiation reactions?
In the eukaryotic cell cycle, cell fusion experiments show that:
Which process occurs in the regulation of gene expression in prokaryotes but does not occur in the regulation of gene expression in eukaryotes?
During translation initiation in prokaryotes, a GTP molecule is needed in:
Watson and Crick proposed the 'Double Helix' structure of DNA based on data produced by ______
Which one of the following statements about Histones is wrong?
