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Nucleus in Cells

A typical nuc...

Question

A typical nucleosome contains around

A

300 bp of DNA helix

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B

100 bp of DNA helix

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C

400 bp of DNA helix

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D

200 bp of DNA helix

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Solution

The correct option is D 200 bp of DNA helix
The nucleosome core particle consists of DNA wrapped around a histone octamer consisting of teo copies each of the four histones H2A, H2B, H3 and H4. A typical nucleosome contains 200 bp of DNA helix.

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Nucleosome contains:

Q. Go through the following statements
(i) A typical nucleosome contains 400 bp of DNA helix.
(ii) The positively charged DNA is wrapped around the negatively charged histone octamer to form a structure called nucleosome.
(iii) Histones are rich in the basic amino acid residues asparagine and valine
(iv) The packing of chromatin at higher level requires additional set of proteins that collectively are referred to as Non-histone chromosomal proteins.

Find the out the incorrect statements,

Q. Read the following statements and select the Correct option.
(i) Loosely packed and lightly stained region of chromatin are called as heterochrormatin.
(ii) Densely packed and dark stained region of chromatin are called as euchromatin.
(iii) A typical nucleosome contains 200 bp of DNA helix.

Q. Read the following statements and select the correct option.
(i) Loosely packed and lightly stained region of chromatin is called as heterochromatin.
(ii) Densely packed and dark stained region of chromatin is called as euchromatin.
(iii) A typical nucleosome contains 200 bp of DNA helix.

Q. In a nucleosome, the DNA is wrapped around

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