Question

In a protein-coding region, a mutation that replaces a single nucleotide for another may or may not change the resulting amino acid.

A) True, mutations always change the resulting amino acid.
B) False, mutations never change the resulting amino acid.
C) True, mutations may or may not change the resulting amino acid.
D) False, mutations always change the DNA sequence but not the amino acid.

Answer 1

Mutations in a protein-coding region can replace a single nucleotide, but they may or may not change the resulting amino acid. Substitution mutations can cause small changes, while silent mutations do not affect the amino acid sequence. Therefore, the answer is true, mutations may or may not change the resulting amino acid.

Step-by-step explanation:

Mutations in a protein-coding region can replace a single nucleotide with another. These mutations may or may not change the resulting amino acid. Substitution mutations can cause a different amino acid to be placed at a specific location in the protein, resulting in small changes. However, not all mutations will lead to a change in the resulting amino acid. Some mutations may be silent, meaning they do not affect the amino acid sequence or the resulting protein. Therefore, the correct answer is:

C) True, mutations may or may not change the resulting amino acid.