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Question

A single nucleoside consists of


A

Sugar + Nitrogenous base

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B

Nitrogenous base + Phosphate group

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C

Sugar + Phosphate

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D

Sugar + Nitrogenous base + Phosphate

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Solution

The correct option is A

Sugar + Nitrogenous base


A nucleoside has two components - a pentose sugar (deoxyribose in DNA and ribose in RNA) and a nitrogenous base (adenine/guanine/thymine/cytosine and adenine/guanine/cytosine/uracil in DNA and RNA respectively).


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