A) tautomerisational mutation
B) analogue substitution
C) point mutation
D) frameshift mutation
Correct Answer: A
Solution :
Out of A- T, G- C pairing, bases of DNA may exist in alternate valency state owing to arrangement called tautomerisational mutation. It involves presence of tautomeric forms of nitrogen bases, .e.g., imino tautomer instead of amino group (.i.e., cytosine-adenine) or enol group instead of keto group (eg,thymine- guanine).
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