JEE Main Chemistry question

When adenine is attached to ribose sugar, it is called adenosine. To make a nucleotide from it, it would require

(A)Oxygenation
(B)Addition of a base
(C)Addition of phosphateCorrect
(D)Hydrogenation

Answer: (C)

Solution

Adenosine (base + sugar) is a nucleoside; adding a phosphate group, esterified to the sugar's hydroxyl group, converts this nucleoside into a nucleotide (such as AMP). Adenosine already has its base

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Question ID VK-150829