Molecular Basis of Inheritance Question 72

72. In a mutational event, when adenine is replaced by guanine, it is a case of

[2004]

(a) frame shift mutation

(b)

(b) transcription

(c) transition

(d) transversion

Show Answer

Answer : c

Hints & Solution

(c) In transition, a purine is replaced by another purine base (A with $G$ or vice-versa). In transversion, a purine is replaced by a pyrimidine base or vice-versa. Frameshift mutation is a type of mutation where the reading of codons is changed due to insertion or deletion of nucleotides. Transcription is the formation of RNA over the template of DNA.