To determine the base sequence of the DNA gene that codes for the mRNA codon AGU, we need to consider the relationships between DNA, mRNA, and codons.
- The DNA sequence is complementary to the mRNA sequence.
- The mRNA codon AGU corresponds to the template strand of DNA.
Given that the mRNA codon AGU has the following base pairs:
- A (adenine) pairs with T (thymine) in DNA
- G (guanine) pairs with C (cytosine)
- U (uracil) in mRNA corresponds to A (adenine) in DNA
Therefore, the complementary DNA sequence would be:
- A in mRNA corresponds to T in DNA
- G in mRNA corresponds to C in DNA
- U in mRNA corresponds to A in DNA
Thus, the DNA sequence that produces the mRNA codon AGU is TCA.
So, the answer is: TCA.
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