BIOL 1105 Chapter Notes - Chapter 7: Oxaloacetic Acid, Hydrolysis, Cellular Respiration

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Organisms can be classified based on how they obtain energy: Autotrophs ("self-feeders"): convert radiant energy into chemical energy. Heterotrophs ("fed by others"): live on organic compound produced by autotrophs. Cellular respiration: energy is harvested- oxidation of organic compounds to extract energy from chemical bonds. Harvest electrons undergo a series of redox reactions. Nad+ accepts a pair of electrons from the substrate to form. Nadh --> product is then from the enzymes active site. Released energy may be lost as heat or may eventually be converted into. After multiple redox reactions, energy-depleted electrons are transferred to final electron acceptor molecule. Transfer often involves cofactors working as electron carriers. All are easily and reversibly oxidized and reduces. Nad+ accepts 2 electrons and 1 proton to become nadh. Final electron acceptor is oxygen (o2) deltag = -686 kcal/mol glucose. Anaerobic respiration: final electron acceptor is an inorganic molecule other than oxygen.

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