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  4. In the diagram, a nucleosome is given. Select the option with correct identification. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-awjzjl1xk4ol.png /> A B C A RNA H1 histone Histone octamer B DNA Linker histone Histone octamer C DNA Histone octamer H1 histone D DNA H1 histone Histone tetramer

Q. In the diagram, a nucleosome is given. Select the option with correct identification.
Question
A B C
A RNA H1 histone Histone octamer
B DNA Linker histone Histone octamer
C DNA Histone octamer H1 histone
D DNA H1 histone Histone tetramer

 1542  235 NTA AbhyasNTA Abhyas 2020Molecular Basis of Inheritance Report Error

Solution:

Histone octamer : It is made up of 8 molecules of histone proteins. Histone proteins are positively charged basic proteins. These proteins are rich in basic amino acids like lysines and arginines. Both of these amino acids possess positive charges in their side chains.
Nucleosome : DNA (negatively charged) wraps the positively charged histone octamer. In a nucleosome, about 200 bp are present in DNA.