Q. If the DNA codons are ATG ATG ATG and a cytosine base is inserted at the beginning, then which of the following will result?
A) CAT GAT GAT G
B) A non-sense mutation
C) C ATG ATG ATG
D) CA TGA TGA TG
Explanation
Non-sense mutation is a mutation which interconverts a nonsense to or from a sense-coding triplet, resulting in an abnormally foreshortened or elongated polypeptide chain. But in this example cytosine is added at the beginning so CAT GAT GAT G will result.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.