Origin of Cells A2.1 PDF

16 Sept 12 1 origin Is. 2024 of cond...

16 Sept 12 1 origin Is. 2024 of conditions of Gravity pulled swirling gas & just ty early Earth High temps turned the gas & just into a solid planet ~ CEE/prehistic Prebiotic Earth the Hadean For (Hares ; hellish) high lightning/storms - : up carth] Atmospheres 1 Hydrogen & Helium escaping : : volcanic erruptions 2 crust forms from volcanic outgasing , low O2 "reducing : , atmosphere" (high #s of reactive gasses like NH3 & H2) - No layerChigh radiation) be ozone of low 02 High volcanic activity to release H2O &CO2 - -Lots of asteroids from solar system forming Model of By & Haldane Oparin life formation 1 Formation of. organic molecules from inorganic compounds Inorganic doesn't have both I & C , small # of atoms : - organic larger molecules , can polymerize requires lots of G to form - : , * They proposed the conditions of early Earth allowed organic compounds to be formed Reactive gasses/atmosphere , high E from volcanic erruptions & lightning. Polymerization 2 formation of polymers (Spontaneous AAs can spontaneously linkby to form polypeptides - (FAs) Fatty acids concentrated to assemble into membranes - RNA nucleotides link wh help from catalysts in clay/water thefi - a "Great Oxygenation Event" O2 concentration in atmosphere : increased from 0 % -20 % 13200 million years ago). self-replication 3. Becomes a cell compartmentalization) 4 What is life? Consensus life : is composed of alls (subcellular components aren't alive) ~ Alive bacteria , fungus animals , plants : , Not alive viruses (no cells don't : grow , can't replicate & metabolize , independently can't do homeostasis independently) ,  A2 I. Cent. ~ Implication O Explaining the Cells are formed from preexisting cells (all cells in humans spontaneous traced back to zygote formed by egg & sperm cells) rising of alls @ All alls can be traced back through evolution to LUCA Last Universal Common Ancestor) ③ "First ever cell was formed from non-living material Likely a membrane surrounding a self-replicating molecule like RNA challenges of Can't explain/prove origin be : origin of cells - Different conditions of early Earth cannot replicate perfectly , - Well-preserved fossils are rare; using them to estimate dates are uncertain Miller-Urey Testing for the formation of simple organic melerules experiment rused to test the above claims about the origin alls of L Water evaporated & reacts w/ CHp NH3. & He gasses w/ , stimulated lightning condenses back into organic molecules , spontaneously formed on EE suggests organic molecules could have Lother evidence ribozymes & protocells (tessils) : Pasteur'. Using a gooseneck flask to reparate & trap experiment microorganisms · boiled to ensure it contained no organisms & Mixture , prove the microorganisms came into the flask externally (didn't spontaneously appear in the mixture Microorganisms then entered mixture & quickly multiplied mixture contained nutrients) Are carbon Discovery of asterics older than Earth suggest that compounds that carbon compounds aren't native to Earth Native? Types of compartmentalization · ↓Vesicles