Final answer:
The tRNA with anticodon 3'-UAC-5' carries the amino acid methionine, as the codon AUG on mRNA, which pairs with this anticodon, specifies methionine in the genetic code.
Step-by-step explanation:
A tRNA molecule with the anticodon 3'-UAC-5' would be carrying the amino acid methionine. This is because tRNA molecules are involved in the translation process of protein synthesis where they bring specific amino acids to the ribosome according to the mRNA codon they complement. The anticodon UAC on the tRNA is complementary to the mRNA codon AUG, which codes for the amino acid methionine.
Each tRNA has a specific three-nucleotide anticodon that pairs with the complementary codon on the mRNA. The attachment of amino acids to the tRNA is catalyzed by enzymes called amino acyl-tRNA synthetases, ensuring the correct amino acid is linked to its corresponding tRNA. As the ribosome moves along the mRNA, each codon is sequentially paired with the appropriate anticodon of a tRNA, thus extending the growing polypeptide chain with the correct sequence of amino acids.