Q.

In nucleoside, the base is attached to which position of sugar molecule?

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a

C-5

b

C-1

c

C-3

d

C-2

answer is A.

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Detailed Solution

In a nucleoside, a base is attached at 1' position of sugar moiety. Nucleoside is linked to phosphoric acid at 5'-position of sugar moiety to give the nucleotide. The same phosphoric acid unit is linked to 3′ position of sugar moiety of other attached nucleoside.

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