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The normal form for A and C, and G and T are _____________

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in Cytogenetics by (679k points)
The normal form for A and C, and G and T are _____________

(a) Imino and Keto

(b) Imino and Enol

(c) Amino and Enol

(d) Amino and Keto

This question was posed to me during an interview for a job.

My question is based upon DNA Mutation in portion DNA Mutation, DNA Repair, Transposable Elements of Cytogenetics

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Right choice is (d) Amino and Keto

Best explanation: The normal form of A and C is amino and that of G and T base is Keto. Shift to imino and enol form is due to tautomeric shift, it is a rare phenomenon.

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