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MCQEasyJEE Main 2025 · 24 January, Shift 2Nucleic Acids (DNA, RNA)

Chemistry Question from JEE Main 2025 · 24 January, Shift 2

Match List - I with List - II:

List - IList - II
(A) Adenine(I) A six-membered ring with two ring N atoms, two ring C=O\text{C}=\text{O} groups and one N−H\text{N}-\text{H}, with no other substituent
(B) Cytosine(II) The same two-nitrogen six-membered ring, with two ring C=O\text{C}=\text{O} groups, one N−H\text{N}-\text{H} and a ring −CH3-\text{CH}_3 group
(C) Thymine(III) A fused bicyclic ring system containing four ring N atoms and carrying an −NH2-\text{NH}_2 group
(D) Uracil(IV) A six-membered ring with two ring N atoms carrying one −NH2-\text{NH}_2 group, one ring C=O\text{C}=\text{O} and one N−H\text{N}-\text{H}

The four List - II structures are shown below, in the order (I), (II), (III), (IV):

Structure (I): a six-membered ring with two ring nitrogen atoms, two ring C=O groups and one N-H, carrying no other substituent.Structure (II): a six-membered ring with two ring nitrogen atoms, two ring C=O groups, one N-H and a methyl group on the ring.Structure (III): a fused bicyclic ring system containing four ring nitrogen atoms and carrying an NH2 group.Structure (IV): a six-membered ring with two ring nitrogen atoms, carrying one NH2 group and one ring C=O together with an N-H.

Choose the correct answer from the options given below:

  • A

    (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

  • B

    (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

  • C

    (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

  • D

    (A)-(III), (B)-(I), (C)-(IV), (D)-(I)

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