Class 12th Biology 2017 Set1 Delhi Board Paper Solution
Question 7
Describe the structure of a nucleosome.
Answer
The negatively charged DNA is wrapped around positiverly charged histone octamer to form a structure called nucleosome. A typical nucleosome consist of 200 bp of DNA helix. It consist four type of proteins which occurs in pairs :
H2A, H2B, H3 and H4
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