To determine which DNA codons code for aspartic acid, we need to first look at the mRNA codons for aspartic acid and their corresponding DNA codons.
Aspartic acid is coded for by the mRNA codons GAU and GAC. Since mRNA is transcribed from DNA, we can convert these mRNA codons back to their corresponding DNA codons.
The codons are translated as follows:
- mRNA codon GAU corresponds to the DNA codon CTA (because DNA is complementary to mRNA).
- mRNA codon GAC corresponds to the DNA codon CTG.
So the options from your list that correctly correspond to aspartic acid are:
D. GAC (mRNA) → C. CTG (DNA) E. GAU (mRNA) → A. CTA (DNA)
Thus, the DNA codons that code for aspartic acid are:
- D (GAC)
- E (GAU)
Therefore, the correct answers are:
- D. GAC
- E. GAU
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