Primordial Soup Haldane had hypothesized the early seas site of 1 st organic

Primordial soup haldane had hypothesized the early

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Primordial Soup Haldane had hypothesized the early seas site of 1 st organic compounds 1 st cells Miller & Urey (Univ. of Chicago) in 1950’s Tested Oparin & Haldane ‘s premise Created a reducing atmosphere Added compounds considered to have been found existing on early earth (hydrogen gas – H2, ammonia – NH3, methane – CH4, and H2O vapor)
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Miller & Urey Experiment: In 1953, Stanley Miller set up a closed system to simulate conditions thought to have existed on early Earth 1. Water mixture in “sea” flask was heated; vapor entered atmosphere flask 2. “Atmosphere” flask contained mix of hydrogen gas, methane, ammonia, and water vapor (believed to mimic early Earth’s atmosphere) 3. Sparks were discharged to mimic lightning 4. Condenser cooled the “atmosphere”, “raining” water and any dissolved molecules down into sea flask 5. As material cycled through apparatus, Miller periodically collected samples for analysis Results: Miller identified variety of organic molecules common in organisms (including simple molecules like formaldehyde (CH2O) and hydrogen cyanide (HCN) and more complex molecules (like amino acids and hydrocarbons) Conclusion: Organic molecules (a 1st step in the origin of life) may have been synthesized abiotically on early Earth
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Miller & Urey’s Experiment
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Miller & Urey’s Results
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Miller-Urey Experim ent Clip
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  • Fall '16
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  • Abiogenesis, Miller & Urey

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