01:119:115 Lecture Notes - Lecture 4: Hydrogen Sulfide, Protocell, Ammonia
3 Oct 2018
School
Department
Course
Professor
Document Summary
Had 4 requirements to occur: conditions of early earth. Occurred in a series of 4 steps. Intense radiation (uv from sun was intense because of absence of ozone) Atmosphere was low in free oxygen (any oxygen would have been tied to other compounds) Hypothesis that life developed from non-living matter probably: The 4 requirements for chemical evolution to have occurred: conditions of early earth. Little or no free oxygen: source of energy to build biological molecules form simple inorganic chemicals, presence of chemical building blocks, time for molecules to accumulate and react with one another. The 4 step hypothesis of single cell formation. >combined to form-: organic macromolecules (abiotic synthesis) ( ex proteins and nucleic acids) >packaging into-: protocells - droplets with membranes that could maintain internal environment from surroundings, origin of self-replicating molecules eventually lead to inheritance. Dissolved inorganic mineral - in form of ions. Atmosphere contained co2, h2o vapor, co, h2 and n2.
