Place the steps of translation elongation in the correct order.(1)Peptidyl transferase forms a peptide bond between the peptide in the P site and the newly arrived aminoacyl-tRNA in the A site.(2)EF-G,with GTP,translocates peptidyl-tRNA to the P site.(3)EF-Tu,with GTP,binds an aminoacyl-tRNA to the ribosomal A site.

Question

Quizplus · Accepted Answer

In elongation, the first step is the binding of an aminoacyl-tRNA to the ribosomal A site, which is facilitated by EF-Tu with GTP. This is step 3. Next, peptidyl transferase forms a peptide bond between the peptide in the P site and the aminoacyl-tRNA in the A site, which is step 1. Finally, EF-G, with GTP, translocates the peptidyl-tRNA from the A site to the P site, which is step 2. Therefore, the correct order is 3, 1, 2 for elongation. Choice A is the only option with this order.

Place the Steps of Translation Elongation in the Correct Order