JEE Main Chemistry question

[WB-JEE 2011] Which one is not a constituent of nucleic acid?

(A)Uracil
(B)GuanidineCorrect
(C)Phosphoric acid
(D)Ribose sugar

Answer: (B)

Solution

Nucleic acids are built from nitrogenous bases (such as uracil and guanine), a pentose sugar (such as ribose), and phosphoric acid, all linked together as nucleotides. Guanidine is a

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Question ID VK-150704