Some bases in the DNA can undergo spontaneous tautomeric shifts, forming chemical structures with unusual base-pairing properties.At what point is the presence of a tautomeric shift most likely to cause a mutation?
A) During addition of a phosphate to a ribonucleoside.
B) During a visit to the beach with a lot of sunlight.
C) In a person suffering from Cockayne syndrome.
D) During addition of bases to a replicating DNA strand.
E) During the excision part of nucleotide excision repair.
Correct Answer:
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