A) transition
B) transversion
C) missense
D) none of these.
Correct Answer: A
Solution :
: The replacement of one base by another is called substitution. It may be - transversion which is the replacement of purine by pyrimidine or pyrimidine by purine and transition which is the replacement of purine by a different purine or pyrimidine by a different pyrimidine. Thymine and cytosine are pyrimidine bases.
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