Question

When a mutation is limited to the substitution of one nucleotide for another, it is called _________.

• A. Translocation
• B. Point mutation
• C. Base inversion
• D. Sugar phosphate deletion
• E. Frameshift mutation

Answer 1

The correct option is B Point mutation

• Translocation is a chromosome aberration caused by the rearrangement of segments between non-homologous chromosomes.
• Base inversion is the removal of a DNA segment and its re-ligation in an inverted sequence.
• A frameshift mutation is the insertion or deletion of nucleotides; the number of altered bases are not in multiples of three.
• A point mutation includes single base modification causing a single nucleotide base change.
• Sugar phosphate deletion is the deletion of the backbone of the DNA that joins the nucleotides together to form DNA.

So, the correct answer is option B.