Final answer:
Peptidyl transferase is an integral part of the ribosome that catalyzes the formation of peptide bonds between amino acids during protein synthesis.
Step-by-step explanation:
The peptidyl transferase is a component of the ribosome. This enzymatic function of the ribosome is essential during the process of translation, where polypeptides are synthesized using an mRNA sequence. Peptidyl transferase activity is a part of the large ribosomal subunit and is responsible for forming peptide bonds between amino acids as they are added to the growing polypeptide chain. It catalyzes the reaction where the carboxyl group of the growing polypeptide is linked to the amino group of a new amino acid, thus extending the chain one unit at a time, according to the sequence dictated by the mRNA template.
Peptidyl transferase, a ribozyme component of the ribosome itself, links the incoming amino acid to a growing chain in a condensation reaction.