A mutation changes one base in a gene but the polypeptide is unchanged. This is possible because
Answer and explanation
Correct answer: B. the genetic code is redundant and several codons code for the same amino acid
- Step 1: Because several codons can code for one amino acid, some substitutions do not change the protein.
Answer
the genetic code is redundant and several codons code for the same amino acid.
Why not the others: mutations never alter the base sequence of any gene in the DNA: mutations are changes in the base sequence. the ribosome corrects the faulty codon before translation takes place: the ribosome does not proofread the codon in this way. every amino acid is coded for by one single unique codon only: most amino acids are coded for by more than one codon.
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