8Cellular Respiration - An Overview of Cellular Respiration...

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An Overview of Cellular Respiration Cellular respiration is the harvesting of energy from breakdown of organic molecules produced by plants The overall process may be summarized as carbon dioxide (heat or ATP) + energy glucose + oxygen + water Cellular respiration is carried out in two stages: 1. Glycolysis 2. Oxidation Occurs in the cytoplasm Occurs in the mitochondria
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An overview of aerobic respiration Oxygen is the terminal electron acceptor in aerobic respiration
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Using Coupled Reactions to Make ATP Glycolysis is the first stage in cellular respiration Takes place in the cytoplasm Occurs in the presence or absence of oxygen Involves ten enzyme-catalyzed reactions These convert the 6-carbon glucose into two 3-carbon molecules of pyruvate
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How glycolysis works 1 6-carbon glucose (Starting material) 6-carbon sugar diphosphate P P 2 ATP Priming reactions 2 6-carbon sugar diphosphate P P 3-carbon sugar phosphate P 3-carbon sugar phosphate P Cleavage reactions 3 3-carbon pyruvate 3-carbon pyruvate NADH ATP 2 3-carbon sugar phosphate P 3-carbon sugar phosphate P NADH ATP 2 Energy-harvesting reactions
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Glycolysis
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Glycolysis This coupled reaction is called substrate-level phosphorylation
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The use of organic
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