Bio - Lecture 8b

Bio - Lecture 8b - Lecture 8b Chemical Energy Aerobic...

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Sheet1 Page 1 Lecture 8b Chemical Energy Aerobic Respiration: The Krebs Cycle: A series of nine reactions where acetly-CoA is oxidized -Acetyl-CoA is the product of pyruvate oxidation Occurs in the mitochondrial matrix Generates several electrons needed to power the proton pump for ATP-synthase Energy storage: The energy contained in glucose resides in its electrons As bonds are sequentially broken, the energy (i.e. electrons) is captured by transport molecules These molecules ultimately transfer the energy to generate the proton gradient which powers the ATP synthase Stage 4: Electron transport chain -It is a series of proteins that generate a proton gradient -They are powered by electrons harvested from catabolism ->The proton gradient is used for other processes besides ATP Synthase There are three enzyme complexes and two electron carriers: -NADH Carries e- form NADH dehydrogenase -Ubiquinone carries e- from NADH dehdryogenase (or FADH2) to the BC1 complex -Cytochrome c carries e- from the BC1 complext to the Cytochrome oxidase complex
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Bio - Lecture 8b - Lecture 8b Chemical Energy Aerobic...

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