tRNA Anticodon to DNA Template Strand Complementarity

Steps:

• tRNA anticodon UAC base-pairs with mRNA codon via A-U, U-A, G-C, C-G rules, yielding mRNA codon AUG.
• mRNA codon AUG is transcribed from the DNA template strand.
• DNA template strand is complementary to mRNA: A pairs with T, U with A, G with C.
• Thus, complementary DNA sequence to AUG is TAC.

Why C is correct:

• TAC is the DNA template strand sequence, as it directly base-pairs with mRNA codon AUG per Watson-Crick rules.

Why the others are wrong:

• A. ATG is the DNA coding strand, which matches mRNA (with T for U), not the template.
• B. AUG is the mRNA codon itself, not a DNA sequence.
• D. TUG contains U, invalid in DNA (which uses T instead).

Final answer: C