Which of the following processes is not catalyzed by RNA A P

Which of the following processes is not catalyzed by RNA?

A) Peptide bond formation in the ribosome.

B) Rejoining of exons.

C) Splicing out of introns.

D) Charging of tRNAs with amino acids.

E) All of the processes are catalyzed by RNA.

Solution

Answer : The correct answer is D (Charging of tRNAs with amino acids)

Explanation : This process is called aminoacylation of tRNA, in which a specific amino acid is attached to the CCA end (Amino acid acceptor end of tRNA) forming charged tRNA. The enzymes that catalyze this process are the aminoacyl-tRNA synthetases.