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Biomolecules — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules1 Mark
Question
What is the difference between a nucleoside and a nucleotide?
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Answer

Unit formed by the attachment of a base (purine or pyrimidine) to 1 ' position of pentose sugar is known as nucleoside. When nucleoside is linked to phosphoric acid at 5 '-position of sugar moiety, we get a nucleotide. Therefore nucleoside contains only pentose sugar and base, whereas nucleotide contains phosphate group also.

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