Question

What are the three different sites on a ribosome and what happens at each of these sites? Does any of this require energy?

Answer 1

The ribosome has three sites: A, P, and E. Each site has a different role in protein synthesis, and the process requires energy from GTP.

Step-by-step explanation:

The ribosome has three different sites: the A site (aminoacyl site), the P site (peptidyl site), and the E site (exit site). Each site plays a specific role during protein synthesis. At the A site, the incoming charged tRNA binds to the mRNA codon. At the P site, the growing polypeptide chain is attached to the tRNA. And at the E site, the uncharged tRNA exits the ribosome. The formation of peptide bonds between amino acids requires energy from GTP, a molecule similar to ATP.