RNA May Have Evolutionary Significance

It seems likely that the range of catalytic activities for RNA will be expanded by future discoveries. For many years prior to the discovery of RNA catalysis, molecular evolu- 

This creates a dilemma of a different sort. How are we to demonstrate ribozyme activities that no longer exist Perhaps we must design our own ribozymes to demonstrate the full potential for RNA to act as an enzyme. This approach is being used by Jack Szostak and Gerald Joyce, who indepen- 

---

Some RNAs Function Like Enzymes Some RNAs Are Self-Splicing Some Ribonucleases Are RNAs Ribosomal RNA Catalyzes Peptide Bond Formation Catalytic RNA May Have Evolutionary Significance Inhibitors of RNA Metabolism... 

---