Normally DNA molecule has A-T and G-C pairing | vedclass

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(D) The nitrogenous bases in $DNA$ $(A, T, G, C)$ can exist in rare alternative structural forms known as tautomers.These tautomeric shifts involve th

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Tautomerisational mutation

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(D) The nitrogenous bases in $DNA$ $(A, T, G, C)$ can exist in rare alternative structural forms known as tautomers.These tautomeric shifts involve the migration of a hydrogen atom (proton) and a shift in a double bond within the molecule.This phenomenon is known as tautomerization.When these bases exist in their rare tautomeric forms,they can form incorrect base pairs (e.g.,$A$ pairing with $C$ instead of $T$),which can lead to mutations during $DNA$ replication.Therefore,the correct term for these rearrangements is tautomerisational mutation.

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

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