(c) A nitrogenous base is attached
to the pentose sugar by an N-glycosidic linkage to form a nucleoside, i.e.,
Nucleoside=Nitrogen base Pentose sugar.
When a phosphate group is attached to
the 5'-OH of a nucleoside through phosphodiester linkage, a nucleotide is
formed, i.e., Nucleotide = Nitrogen base+ Pentose sugar +Phosphate (PO4).
So, a nucleoside differs from a
nucleotide as it lacks the phosphate group.
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