Ribosomes has following enzymatic activity?: (A) Peptidyl transferase, (B) Peptidase, (C) Aminoacyl tRNA synthetase, (D) GTPase
Answer is A. The formation of peptide bonds is catalysed by peptidyl transferase, an activity intrinsic to the 23 S r-RNA of 50 S subunit in prokaryotes and 28 S r-RNA of 60 S subunit in eukaryotes. So, it is referred to as ribozyme & indicates a direct role of r-RNA in protein synthesis.