Multiple choice

The oxo and amino groups of purines and pyrimidines exhibit which of the following type of tautomerism?

  1. Keto-enol and amine-imine

  2. Methyl-methenyl

  3. Amide-imidic

  4. Ketene-yenol

  5. Enamine-enamine
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A Correct answer
Explanation

Purines and pyrimidines have amine and keto groups attached to the heterocyclic ring.

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