MHT CET 2025 Chemistry question

What are the positions of 'N' atoms present in purine ring of nucleic acids?

(A)1, 3 and 5
(B)1,3 and 9
(C)1, 5, 7 and 9
(D)1, 3, 7 and 9Correct

Answer: (D)

Solution

Purine is a fused bicyclic ring: a six-membered pyrimidine ring fused with a five-membered imidazole ring, numbered 1 to 9. It contains four nitrogen atoms, located at positions 1, 3, 7 and 9 (carbons at 2, 4, 5, 6 and

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Question ID VK-103122