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Normally DNA molecule has A-T, G-C pairi...

Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangements called

A

Point mutation

B

Analogue substitution

C

Frame-shift mutation

D

Tautomerisational mutation

Text Solution

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The correct Answer is:
D
The changed pairing qualities of the bases (pairing of purine with purine and pyrimidine with pyrimidine) are due to phenomenon called tautomerism. These are alternate forms of bases and are produced by rearrangement of electrons and protons of molecules.
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