Aspartic acid is coded by the mRNA codons GAC and GAU. To find the corresponding DNA codons, we need to convert these mRNA codons to DNA by replacing uracil (U) with thymine (T).
The mRNA codons for aspartic acid:
- GAC → the corresponding DNA codon is CTG (because G in RNA corresponds to C in DNA).
- GAU → the corresponding DNA codon is CTA (because A in RNA corresponds to T in DNA).
Given your options, the DNA codons that code for aspartic acid are:
- D. GAC (the mRNA codon)
- E. GAU (the mRNA codon)
Note that the question asked for the DNA codons; thus you may need to interpret "D. GAC" and "E. GAU" as references from mRNA, the right DNA codons for Aspartic Acid are:
- CTC (for GAU)
- CTG (for GAC)
However, among the direct options provided, there is an error because they are not specifying the initial conversion into mRNA.
Thus the options you'd select as being the correct DNA codons in terms of translation into mRNA encoding would be the correlating ones for the aspartic acid codon. Therefore:
- D. GAC
- E. GAU
These represent the correct connection through their identity on the respective strands.