Which type of mutation converts a nucleotide to an alternative structure with the same composition but slightly different placement of hydrogen bonds with a rare,less stable form that causes base-pair mismatch?

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A tautomeric shift is a type of mutation that converts a nucleotide to an alternative structure with the same composition but slightly different placement of hydrogen bonds with a rare, less stable form that causes base-pair mismatch. Depurination and deamination involve the loss or substitution of a nitrogenous base, while transition and transversion involve the substitution of one base for another.

Which Type of Mutation Converts a Nucleotide to an Alternative