Question

Choose the correct answers from the alternatives given.
When a mutation is limited to the substitution of one nucleotide pair for another, it is called a

• A. point mutation
• B. base inversion
• C. translocation
• D. sugar-phosphate deletion

Answer 1

The correct option is A point mutation

• A point mutation is one in which a single nucleotide is inserted, deleted or modified (substituted) in a DNA sequence.
• Base inversion mutation occurs when a sequence of DNA from a gene breaks away and re-attaches to another gene in the reverse order.
• Mutation in which a chromosomal segment changes location is called translocation. It may occur within the same chromosome or between two non-homologous chromosomes.

So, the correct option is 'point mutation'.