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Nucleosome

The length of...

Question

The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?

A

Deletion of non-essential genes

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B

Super-coiling in nucleosome

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C

DNAase digestion

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D

Through elimination of repetitive DNA

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Solution

The correct option is B Super-coiling in nucleosome
The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. This DNA accommodated by super coiling in nucleosome.

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Q. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accomodated?

Q. In the eukaryotes the DNA molecules are organised withing the nucleus. How is the DNA molecules organised in a bacterial cell in the absence of nucleus?

Q. Assertion: Eukaryotic genome is classified into highly repetitive, moderately repetitive, and single-copy DNA on the basis of reiteration.
Reason: Reassociation kinetics of repetitive DNA is slower than the non-repetitive DNA.

Q. In the eukaryotic genome
(A) Repetitive DNA is represented as a different peak in density gradient centrifugation
(B) The classification of microsatellite and minisatellite is based on the base composition, length of the segment, and number of repetitive units
(C) Coding DNA forms a large portion of the human genome
(D) Repetitive DNA shows high degree of polymorphism

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5 p g

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