The reaction in which the growing chain from the tRNA in the P site covalently joins the chain to the tRNA in the A site is catalyzed by which of the following enzymes?
A) Gyrase
B) Topoisomerase
C) Peptidyl transferase
D) Aminoacyl - tRNA synthetase
E) Ligase

Question

Quizplus · Accepted Answer

Peptidyl transferase catalyzes the formation of peptide bonds between the amino acid in the A site and the growing polypeptide chain in the P site. This results in the elongation of the polypeptide chain during translation. Gyrase and topoisomerase are involved in DNA replication and DNA supercoiling, not protein synthesis. Aminoacyl-tRNA synthetase is responsible for attaching the correct amino acid to the correct tRNA in the cytoplasm. Ligase enzymatically joins two molecules using energy from ATP, but is not involved in protein synthesis.

The Reaction in Which the Growing Chain from the TRNA