A tautomeric shift in adenine (amino to imino) allows it to pair with . . . . . . . . only.
A. Cytosine
B. Uracil
C. Guanine
D. Thymine
Answer: Option A
Solution (By Examveda Team)
A tautomeric shift in adenine (amino to imino) allows it to pair with Cytosine only.The spontaneous isomerization of a nitrogen base to an alternative hydrogen-bonding form, possibly results in a mutation.
Reversible shifts of proton position in a molecule. Bases in nucleic acids shift between keto and enol forms or between amino and imino forms.
This Question Belongs to Agriculture >> Genetics And Plant Breeding
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