BISC 101 Lecture Notes - Lecture 6: Oxidative Phosphorylation, Anaerobic Respiration, Cellular Respiration

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Cell respiration: is the breaking down of fuel/energy to turn into atp. Atp is the energy currency, powers most cellular work. Cell respiration is all about taking that massive release of energy and breaking it down into a large amount of smaller steps: tracking electrons along the process. Glycosis: harvests chemical energy by oxidising glucose to pyruvate pyruvate oxidation. Citric acid cycle: completes energy yielding oxidation of organic molecules. During oxidative phosphorylation, chemiosmosis couples electron transport to atp synthesis. Etc shuts down and pyruvate accepts electrons from nadh instead but this produces lactate as byproduct. Regenerates nad+ from stockpiles of nadh: alcohol fermentation: After glycolysis, pyruvate is converted to acetaldehyde (and co2) which accept electrons from nadh but this produces ethanol as a by-product. The co2 makes bread rise and beer fizzy i. e. yeast! Plants use photosynthesis to convert light energy to o2 and organic molecules. Organic molecules: fuel that is broken down to generate atp via cellular respiration.

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