Question

When a purine is replaced by a pyrimidine in a part of DNA, the mutation so produced is called.

• A. Transition
• B. Transversion
• C. Deletion
• D. Reversal

Answer 1

The correct option is B Transversion

In case of transition, purine base is replaced by another purine base

e.g. A⇌G (A=adenine, G=guanine) and pyrimidine is replaced by another pyrimidine e.g.,C⇌T (C=cytosine, T=thymine) and vice-versa.

In case of transversion, purine is replaced by a pyrimidine and vice-versa.

So, the correct answer is 'Transversion'.