A mutation involving change in one nucleotide; example is a substitution.

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Multiple Choice

A mutation involving change in one nucleotide; example is a substitution.

Explanation:
Mutations that affect a single nucleotide are called point mutations. A substitution is a specific way a point mutation can occur—one nucleotide is replaced by a different one. Insertion and deletion mutations involve adding or removing nucleotides, which changes the sequence by more than one nucleotide and can shift the reading frame. Since the description centers on a change in just one nucleotide, the broad category that fits best is point mutation, with substitution being a concrete example of that type.

Mutations that affect a single nucleotide are called point mutations. A substitution is a specific way a point mutation can occur—one nucleotide is replaced by a different one. Insertion and deletion mutations involve adding or removing nucleotides, which changes the sequence by more than one nucleotide and can shift the reading frame. Since the description centers on a change in just one nucleotide, the broad category that fits best is point mutation, with substitution being a concrete example of that type.

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