During initiation of protein synthesis in prokaryotic and eukaryotic systems, GTP is hydrolyzed
A) to GMP when mRNA joins the ribosome.
B) to GMP when the large ribosomal subunit joins the growing initiation complex.
C) to GDP when mRNA joins the ribosome.
D) to GDP when the large ribosomal subunit joins the growing complex.
E) none of the above

Question

Quizplus · Accepted Answer

GTP is hydrolyzed to GDP when the large ribosomal subunit joins the growing initiation complex in both prokaryotic and eukaryotic systems. This hydrolysis releases energy that helps to drive the formation of peptide bonds between amino acids during translation.

During Initiation of Protein Synthesis in Prokaryotic and Eukaryotic Systems