What occurs during translation?
(A) I and II only
(B) I and III only
(C) II and III only
(D) I, II and III
The table shows information on the genetic code of four different mRNA sequences. Which sequence demonstrates degeneracy in the genetic code?
| mRNA sequence | Amino acids | |
|---|---|---|
| A | UUU UUA UCU | Phe Leu Ser |
| B | CUU CCU CUU | Leu Pro Leu |
| C | AUG ACG AAG | Met Thr Lys |
| D | GUU GGU GUG | Val Gly Val |
Correct Answer: \( \boxed{\mathbf{D}} \)
Degeneracy of the genetic code means that different codons can code for the same amino acid. In option D, the codons GUU and GUG both code for valine (Val), demonstrating this property of the genetic code.
Which of the following is a consequence of the degeneracy of the genetic code?
Correct Answer: \( \boxed{\mathbf{C}} \)
The genetic code is degenerate, meaning that more than one codon can code for the same amino acid. As a result, some base substitutions are silent mutations and do not change the amino acid sequence or the structure of the protein.
