Final answer:
The mRNA sequence that is complementary to the sequence UAG on a tRNA is AUC, which corresponds to answer option B. This is based on base pairing rules where A pairs with U and C pairs with G.
Step-by-step explanation:
The question pertains to the field of molecular biology, specifically involving the interactions between mRNA and tRNA in the process of protein synthesis. mRNA (messenger RNA) and tRNA (transfer RNA) are both types of RNA that play crucial roles in translating genetic information into functional proteins.
The mRNA sequence that is complementary to the sequence UAG on a tRNA is AUC. This is because, in RNA, adenine (A) pairs with uracil (U) and cytosine (C) pairs with guanine (G). Hence, for the anticodon UAG on tRNA, the corresponding codon on mRNA would be AUC, which is the correct option B for this question.
Understanding the principles of complementarity and codon-anticodon pairing is essential for interpreting the genetic code and predicting the outcome of translation.