Question

Protein synthesis is performed by an RNA-protein complex called the Ribosome. As you can see in the image, a ribosome is composef of 3 sites caled E, P and A. To which site does tRNA add its amino acid to the polypeptide chain?

Answer 1

tRNA adds its amino acid to the polypeptide chain at the A site of the ribosome during protein synthesis.

Step-by-step explanation:

During protein synthesis, transfer RNA (tRNA) adds its amino acid to the growing polypeptide chain at the A site of the ribosome. The ribosome features three sites: A (aminoacyl), P (peptidyl), and E (exit). When a tRNA carrying an amino acid enters into the ribosome, it first comes to the A site, where it is matched with the codon on the mRNA strand. The amino acid is then transferred to the growing polypeptide chain, which is held at the P site. After this transfer, the now uncharged tRNA moves over to the E site before being released back into the cytoplasm.