9.2.05 () L 03 - September 2 2005 – Origin of...

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September 2, 2005 – Origin of Life (Prokaryotes) Review: Miller and Urey were able to test experiment and create urea, HCN, simple sugars, nitrogen bases, amino acids He also found that in the presence of phosphate, complex molecules could also be formed. RNA too. Eigen discovered that RNA was a self replicating molecule and a catalyst. View ppt slide on RNA replication. He noticed that As attracted Us, Us As, Cs Gs, Gs s RNA is a Catalyst Cech and Altman discovered that RNA was a catalyst (ribozymes) Some functions of ribozymes: o Removal of introns o RNA replication & elongation o Coding for proteins (tRNA) o Translation o Binding AAs to specific tRNAs. RNAs were in “The Primordial Soup” Catakysis Self-replication Familes of similar RNAs produced (from replication) HOWEVER, errors occur, which leads to molecular evolution Adapter Molecules Possible RNA Timeline 1 st RNA forms Learns to copy itself learns how to catalyze protein ynthesis
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