Question

The mRNA codons UCU, UCC, UCA, and UCG all code for the same amino acid, serine. The pattern shown by this example is something that scientists call the “wobble effect.” What does this observation demonstrate? (SC.912.L.16.4)A. The genetic code is the same for nearly all organisms.B. A mutation in one base will always have a physical effect on the resulting protein.C. The genetic code does not dictate the amino acid sequence of proteins.D. A mutation in one base could have absolutely no physical effect on the resulting protein.

Answer 1

The answer would be: D. A mutation in one base could have absolutely no physical effect on the resulting protein.

If you pay attention to the codon for serine, any mutation on the third amino base will still produce serine. Since there is no change in the resulting protein, the mutation would be called silent mutation since the mutation is not causing any effect. This experiment demonstrates how a mutation doesn't always lead to a physical change or any defect.