Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called[1994]a)analogue substitutionb)tautomerisational mutationc)frame-shift mutationd)point mutationCorrect answer is option 'B'. Can you explain this answer?

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Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called

[1994]

a)
analogue substitution
b)
tautomerisational mutation
c)
frame-shift mutation
d)
point mutation

Correct answer is option 'B'. Can you explain this answer?

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Out of A-T, G-C pairing, bases of DNA may exist in alternate valency s...

The tautomer forms of nitrogen bases are immuno-tautomer instead of amino group (e.g. cytosine, adenine) or enol instead of the keto group (e.g. thymine, guanine).
Tautomers are organic compounds that are interconvertible by a chemical reaction called tautomerization. The concept of tautomers that are interconvertible by tautomerizations is called tautomerism. Tautomerism is a special case of structural isomerism and can play an important role in noncanonical base pairing in DNA and especially RNA molecules.

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Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called[1994]a)analogue substitutionb)tautomerisational mutationc)frame-shift mutationd)point mutationCorrect answer is option 'B'. Can you explain this answer?

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