Question

one nucleotide base is changed so only one amino acid is affected. options: 1 inverse mutation, 2 substitution mutation, 3 point mutation, 4 translocation

Explanation:

The description defines a mutation where a single nucleotide base alteration impacts only one amino acid. Point mutations are defined as changes to a single nucleotide in DNA, which can result in a change to one amino acid (missense point mutation) or no change (silent), but the given description aligns with the core characteristic of a point mutation. Inverse mutation is not a standard term for this type of change, substitution is a type of point mutation but the broader category matching the definition is point mutation, and translocation involves moving entire chromosome segments, not single nucleotide changes.

Answer:

1. Point Mutation