A is composed of sugar molecule and nitrogen base.

nucleotide

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nucleoside

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nucleic acid

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nucleosome

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Solution

The correct option is B nucleoside
Nucleoside is composed of sugar molecule and nitrogen base.

Nucleotide is made up of a nuceloside and a phosphate group.

Nucleic acid is a chain of nucleotides held together by phosphodiester bonds.

Nucleosome is composed of DNA wrapped around a core of histone proteins.

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A nucleotide consists of a sugar molecule, a nitrogenous base, and a phosphate group.

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