- A Compare Between The Hot And Cold Chemistry Based On The Prebiotic Synthesis Experiment Model B Justify The Need Of 1 (15.24 KiB) Viewed 11 times
A) Compare between the hot and cold chemistry, based on the prebiotic synthesis experiment model? B) Justify the need of catalysis in the origin of life?
experiment Figure 4.7 Could Biological Molecules Have Been Formed from Chemicals Present in Earth's Early Atmosphere? Original Papers: Miller, S. L. 1953. A production of amino acids under possible primitive earth conditions, Science 117; 528-519, Miller, S. L. and H. C. Urey. 1959. Organic compound synthesis on the primitive earth. Science 130: 245-251. With an increased understanding of the atmospheric conditions that existed on primitive Earth, the researchers devised an experiment to see if these conditions could lead to the formation of organic molecules. HYPOTHESIS Organic chemical compounds can be generated under conditions similar to those that existed in the atmosphere of primitive Earth. METHOD RESULTS 1 Heat a solution of simple chemicals to produce an "atmos- phere" of methane, ammonia, hydrogen, and water vapor. Heat "Atmospheric" compartment "Oceanic" compartment NH3 H₂O H₂ CH4 - Cold water Condensation 2 Electrical sparks simulating lightning provide energy for synthesis of new compounds. 3 A condenser cools the "atmospheric" gases in a "rain" containing new compounds. The compounds collect in an "ocean." Collect and analyze condensed liquid. Reactions in the condensed liquid eventually formed organic chemical compounds, including amino acids. CONCLUSION The chemical building blocks of life could have been generated in the probable atmosphere of early Earth.