Question Detail

Anticodon is on tRNA and pairs with mRNA codon. If anticodon is AUC, it pairs with mRNA codon UAG (A-U, U-A, C-G). mRNA is transcribed from DNA. The DNA strand that served as template for this mRNA would be complementary to the mRNA. For mRNA UAG, the DNA template strand is ATC. So the DNA triplet is ATC? Wait, careful. The question asks for the DNA triplet. The DNA triplet on the coding strand is the same as the mRNA (with T instead of U). So, mRNA codon = UAG, so the corresponding DNA triplet on the coding (non-template) strand would be TAG. Option B is TAG.