Question

question 13 of 15
some mutations do not affect the amino acid sequence of the protein produced using the mutated gene.
how can the correct amino acid be incorporated into the protein despite a mutation in the gene sequence?
enzymes correct many of the mistakes in the amino acid sequence after the protein is made.
only the first of the three nucleotides in a codon is used to determine the correct amino acid.
the codon containing the mutation may still specify the original amino acid.
some mutations are detected and corrected as the pre - mrna is being synthesized.

Explanation:

• Enzymes do not correct amino acid sequence mistakes after protein synthesis.
• All three nucleotides in a codon are important for determining the amino acid.
• The genetic code is degenerate, meaning multiple codons can code for the same amino acid. So, a mutation in a codon may result in a codon that still codes for the original amino acid.
• Mutations are not detected and corrected as pre - mRNA is being synthesized in a way that would prevent the wrong amino acid (if the codon change was non - degenerate).

Answer:

C. The codon containing the mutation may still specify the original amino acid.