Final answer:
In translation, the correct sequence of tRNA binding sites an mRNA codon passes through on the ribosome is A site, P site, E site.
Step-by-step explanation:
During translation, an mRNA codon will pass through a specific sequence of tRNA binding sites on the ribosome. The correct sequence is A site, P site, E site. Initially, a charged tRNA molecule carrying an amino acid binds to the mRNA at the A site. Then, a peptide bond forms between this amino acid and the growing polypeptide chain, which is held at the P site. After the peptide bond formation, translocation occurs, moving the tRNA at the P site to the E site, where it will eventually be released. Simultaneously, the tRNA that was in the A site, now carrying the growing polypeptide chain, moves to the P site.
This movement makes room for the next charged tRNA to bind to the A site and continue the process of polypeptide elongation.Charged tRNAs first bind to the A site, then move to the P site as the chain elongates, and finally exit through the E site.
Charged tRNAs first bind to the A site, then move to the P site as the chain elongates, and finally exit through the E site.