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प्रश्न
Explain the role of histones in forming a nucleosome.
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उत्तर
(i) Histones are positively charged basic proteins which are organised to form a unit of eight molecules called histone octamer.
(ii) Histones are rich in the basic amino acids residues lysines and arginines which carry positive charges in their side chains.
(iii) The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called nucleosome.
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संबंधित प्रश्न
Describe the structure of a nucleosome.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
The additional set of proteins required for packaging of chromatin at higher level are called ______.
The net electric charge on DNA and histones is ______.
Histone proteins are ______.
Which one of the following cell organelle is considered as ‘Cell within a cell’?
During translation initiation in prokaryotes, a GTP molecule is needed in:
What is the function of histones in DNA packaging?
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
Define the Transfection.
