How does a tRNA molecule acts as a translator?
In other words, what ensures that the correct amino acid is added to a growing peptide chain?|||Enzymes (called aminoacyl-tRNA synthetases) are responsible for charging tRNA molecules -- that is, attaching amino acids to them. A tRNA molecule has 2 main sites: a anticodon loop (which contains the 3-base anticodon) and an acceptor site (where an amino acid is attached). The enzymes that charge tRNAs are able to attach the correct amino acid to the correct tRNA.
Then the charged tRNAs, carrying the correct amino acids for their anticodons, dock in the A site of the ribosome, based on complementary base pairing between the tRNA's anticodon and the mRNA's codon. Therefore, the correct amino acid for the mRNA codon is added to the growing polypeptide chain.|||Each tRNA carries a certain amino acid, it can only be added to the peptide chain if the tRNA anticodon can pair with the mRNA. Once it pairs the peptide chain is attached to the new amino acid
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