HHMI Holiday Lectures on Science 1995. The Double Life of RNA. Lecturer: dr. Thomas R. Cech, 1989 Noble Laureate. Dr. Cech continues to explain what is the difference between chemical and biochemical reaction in sense of all at once and continuous reactions. Next protein synthesis is discussed followed by protein functions. RNA is able to be an enzyme, hence lecture title double life of RNA. Second one is coding for amino acid sequence in protein. How DNA is different from RNA? Why RNA can be catalyst? Molecule architecture is discussed.