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Question

A pentose sugar is linked to nitrogenous base by a.

A
N-glycosidic bond
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B
Hydrogen bond
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C
phosphodiester bond
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D
ionic bond
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Solution

The correct option is A N-glycosidic bond
Nucleosides are nitrogenous bases that are covalently bonded to ribose or deoxyribose by a N-glycosidic bond. So a nucleoside consists of a nitrogenous base covalently attached to a sugar (ribose or deoxyribose) but without the phosphate group.

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