Translocation in protein synthesis is best defined as:
A) movement of a new aminoacyl-tRNA into the A site.
B) movement of the growing peptide chain from the tRNA in the P site to the tRNA in the A site
C) movement of the peptidyl-tRNA in the A site to the P site.
D) dissociation of the tRNA in the P site from the ribosome.
E) scanning of a ribosome along an mRNA in search of the initiation codon.

Question

Quizplus · Accepted Answer

Translocation in protein synthesis refers to the movement of the peptidyl-tRNA from the A site to the P site. This occurs after the peptide bond between the amino acid in the A site and the growing peptide chain attached to the tRNA in the P site is formed. The ribosome then moves down the mRNA by one codon, and the empty tRNA in the P site is released while the peptidyl-tRNA in the A site is now in the P site. This process allows the ribosome to read the mRNA in a 5' to 3' direction and continue adding amino acids to the growing peptide chain.

Translocation in Protein Synthesis Is Best Defined As