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JEE Main · 2014 · 06 Apr 2014 · Offline · Biomolecules

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Which one of the following bases is not present in DNA?
  1. (A)Cytosine
  2. (B)Thymine
  3. (C)Quinoline✓ Correct
  4. (D)Adenine

Answer: (C)

Solution

The bases of DNA are two purines, adenine and guanine, and two pyrimidines, cytosine and thymine. Quinoline, a benzene ring fused to pyridine, is none of these. So quinoline is the base not present in DNA.

JEE Main · 2014 · 06 Apr 2014 · Offline · Single correct option

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