01:119:115 Lecture Notes - Lecture 4: Harold Urey, Protocell, Stanley Miller
27 Sep 2016
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Atmosphere co2, h2o vapor, co, h2, n2, nh3, h2s, c. iii. 4. Life arose ~3. 5 billion years ago: hypotheses that support abiotic synthesis d. i. Conditions of early earth favored spontaneous formation of simple organic molecules d. iv. Tested by stanley miller and harold urey d. v. 1. a. 1953 d. v. 2. enclosed apparatus d. v. 2. a. designed to simulate the conditions of early earth d. v. 2. a. i. Examined the compounds that were formed in that chamber d. v. 2. b. i. Found amino acids and other organic molecules d. vi. Organic molecules d. vii. 1. d. vii. 2. d. vii. 3. d. vii. 4. d. viii. 1. d. viii. 2. Life formed at the cracks of the ocean floor d. ix. 1. a. Four steps of abiogenesis: abiogenesis hypothesis that suggests that life developed from non-living matter a. i. Abiotic synthesis a. i. 1. small organic molecules are being formed spontaneously (combined) a. ii. organic macromolecules a. ii. 1. ex. Drip amino acid solutions onto hot rock -> polypeptides: formation of protocells d. i. Fluid filled compartment surrounded by membrane-like structure d. ii. Ex: form when lipids or other organic molecules are added to water d. iii.
