If the mRNA base is uracil the complementary base in translation is?

In translation, if the mRNA base is uracil (U), the complementary base in tRNA is adenine (A). This base pairing occurs during the process of translation when tRNA molecules bring amino acids to the ribosome, matching their anticodons to the codons on the mRNA strand. Thus, uracil pairs with adenine to ensure the correct amino acid is added to the growing polypeptide chain.