In the elongation stage of translation,
A) the message is read in a 3'-to-5' direction.
B) the polypeptide chain grows from the C terminus to the N terminus.
C) peptidyl transferase activity is catalyzed by a ribosomal protein.
D) tRNA is catalytically active.
E) rRNA is catalytically active.

Question

Quizplus · Accepted Answer

During elongation, the ribosome moves along the mRNA in the 5F1F1F1S1F1F1F10-to-3F1F1F1S1F1F1F10 direction, and the polypeptide chain grows from the N terminus to the C terminus. The peptidyl transferase activity, which catalyzes the formation of peptide bonds between amino acids, is carried out by the rRNA component of the ribosome. The tRNA molecules deliver amino acids to the growing polypeptide chain, but they are not catalytically active.

In the Elongation Stage of Translation