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Nucleosome

Histones are ...

Question

Histones are responsible for packaging the DNA into a compact structure.

A

nucleotides

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B

proteins

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C

nucleic acids

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D

carbohydrates

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Solution

The correct option is B proteins
Histones are proteins that condense and package the DNA of a eukaryotic cell into units called nucleosomes. Their positive charge allows them to associate with the negatively charged DNA.

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Q. Histones are responsible for packaging the DNA into a compact structure.

Q. Assertion :Histones are basic proteins of major importance in packaging of eukaryotic DNA. DNA and histones comprise chromatin forming the bulk of eukaryotic chromosome. Reason: Histones are of five major types:

H_{1}, H_{2} A, H_{2} B, H_{3}

H_{4}

.

Q. DNA is packaged with non-histone protein to form nucleoid.

Q. Histone is a protein that primarily works as a DNA packaging molecule.

Q. How are the following formed and involved in DNA packaging in a nucleus of a cell?
(i) Histone octomer (ii) Nucleosome (iii) Chromatin.

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