During translocation, the movement of the ribosome repositions the tRNA linked to the growing polypeptide chain to the ____ site, thereby vacating the ____ site for the arrival of a new amino-acyl tRNA.
A) A; P
B) P; A
C) initiation; termination
D) large ribosomal subunit; small ribosomal subunit
E) small ribosomal subunit; large ribosomal subunit

Question

Quizplus · Accepted Answer

During translocation, the ribosome moves the tRNA with the growing polypeptide chain from the A (aminoacyl) site to the P (peptidyl) site. This movement vacates the A site, allowing a new amino-acyl tRNA to enter, facilitating the continuation of protein synthesis.

During Translocation, the Movement of the Ribosome Repositions the TRNA