Essential Biochemistry - Regulation Of Gene Expression And Mutation (Section 1 - No. 35)

Which of the following is the result of a transition mutation?
A purine replaces a pyrimidine.
A pyrimidine replaces a purine.
A purine replaces a purine.
A base is inserted

Explanation

Transition involves a purine replacing a purine or a pyrimidine replacing a pyrimidine.

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