To find the original DNA triplet sequence that corresponds to the mRNA codon AUG, we need to remember the base pairing rules: Adenine (A) pairs with Thymine (T) in DNA, and Uracil (U) in RNA, while Uracil (U) in RNA pairs with Adenine (A) in DNA. Cytosine (C) pairs with Guanine (G), and Guanine (G) pairs with Cytosine (C).
Since the mRNA sequence is AUG, we can deduce the corresponding DNA sequence. The mRNA codon AUG is made up of:
- A -> T
- U -> A
- G -> C
Therefore, the corresponding DNA triplet sequence would be TAC.
Thus, the original DNA triplet sequence is TAC.
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