BIOL 102 Lecture Notes - Lecture 11: Cytosol, Photosystem Ii, Chlorophyll
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1. use substance other than o2 as nal electron accepter in etc. 2. if con ned to using o2, carry out glycolysis only. Aerobic produces 35 atp and 50% of total energy is recovered. Anaerobic produces 2 atp and 4% of total energy is recovered. Absence of oxygen = kreb"s cycle stops and glycolysis is only left. Producing lactate converts pyruvate to lactate which uses 2 nadh and turns it to 2. Nad+ so it can be used for glycolysis. Lactic acid does not exist in the body; is actually lactate. Producing ethanol converts pyruvate to ethanol which uses 2 nadh and turns it to 2. Nad+ so it can be reused for glycolysis. Ingesting too much ethanol; ethanol is broken down to acetaldehyde then to acetate; sometimes acetaldehyde which can cause the hangover feeling (also harmful to body) Obligate anaerobes: carries out fermentation or anaerobic respiration and cannot survive in o2 presence.