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JEE Main · 2019 · 11 Jan 2019 · Shift 1 · Biomolecules

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Among the following compounds, which one is found in RNA?
  1. (A)(see structure)
  2. (B)(see structure)
    ✓ Correct
  3. (C)(see structure)
  4. (D)(see structure)

Answer: (B)

Solution

The question asks for the base that marks a nucleic acid as RNA. Cytosine, guanine and adenine occur in both DNA and RNA, so none of them singles out RNA. The distinguishing base is uracil, which takes the place of thymine whenever the nucleic acid is RNA. The compound found in RNA is therefore uracil.

JEE Main · 2019 · 11 Jan 2019 · Shift 1 · Single correct option

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