Eduprobe
Question:
Which one of the following is a wrong statement regarding mutations?
Change in a single base pair of DNA does not cause mutation.
Cancer cells commonly show chromosomal aberrations.
Deletion and insertion of base pairs cause frame-shift mutations.
UV andγ-rays are mutagens.
Solution:
Cancer cells commonly show chromosomal aberrations. Change in a single base pair of DNA cause mutations, which are called as point mutations. UV and γ-rays are mutagens, i.e., the mutation causing agents. Insertion or deletion of one or two bases changes the reading frame from the point of insertion or deletion. However, such mutations are referred to as frameshift insertion or deletion mutations. So, the statement in option A is wrong.