Advertisements
Advertisements
प्रश्न
Explain the role of histones in forming a nucleosome.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Very Short Answer Question:
Which are the nucleosomal 'core' histones?
The net electric charge on DNA and histones is ______.
Histone proteins are ______.
Electron Transport System (ETS) is present in a eukaryotic cell in the:
Whittaker placed prokaryotes in:
What is the function of histones in DNA packaging?
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
In an experiment, DNA is treated with a compound which tends to place itself amongst the stacks of nitrogenous base pairs. As a result of which, the distance between two consecutive base increases, from 0.34nm to 0.44 nm. Calculate the length of DNA double helix (which has 2 × 109 bp) in the presence of saturating amount of this compound.
Define the Transfection.
