Which statement is true of the translocation phase of elongation during protein synthesis?
A) The empty tRNA moves to the A site of the ribosomal complex.
B) The empty tRNA moves to the T site of the ribosomal complex.
C) The dipeptide moves from the A site to the P site of the ribosomal complex.
D) The dipeptide moves from the P site to the A site of the ribosomal complex.

Question

Quizplus · Accepted Answer

During the translocation phase of elongation in protein synthesis, the ribosome moves along the mRNA, causing the tRNA that was in the A site with its attached amino acid (now part of a growing peptide chain) to shift to the P site. This process effectively moves the newly formed dipeptide (or growing polypeptide chain) from the A site to the P site, not the other way around. The empty tRNA then exits the ribosome from the E (exit) site, not mentioned in the options.

Which Statement Is True of the Translocation Phase of Elongation