Question

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a dna mutation results in a protein that is the same as the initial protein synthesized before the mutation. which statement best explains this outcome?
only mutations that occur at the chromosomal level change protein function.
one amino acid substitution does not affect protein synthesis.
different codons can be translated into the same amino acid, so some mutations do not affect protein synthesis.
amino acids have similar functions, so their corresponding proteins are unaffected by mutations.

Explanation:

The genetic code is degenerate, meaning different codons can code for the same amino acid. So, a mutation that changes a codon to another codon for the same amino acid (a silent mutation) won't affect protein synthesis.

Answer:

One amino acid substitution does not affect protein synthesis.