Question

The mutational event, where adenine is replaced by guanine is

• A. Transition
• B. Transversion
• C. Frameshift mutation
• D. Transcription

Answer 1

The correct option is A Transition

Transition is a point mutation that changes a purine nucleotide to another purine (A <--> G) or a pyrimidine nucleotide to another pyrimidine (C <-->T). Approximately two out of three single nucleotide polymorphisms are transitions. Transitions can be caused by oxidative deamination and tautomerization.