Metabolic pathways 3 8 10

Metabolic pathways 3 8 10 - Metabolic pathways A membrane...

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Metabolic pathways A membrane proton gradient supplies proton motive force to drive chemiosmotic ATP synthesis by ATP synthase Glycolysis, pyruvate oxidation, and the citric acid cycle extract electrons from food, to generate NADH, which delivers electrons to the electron transport chain, to replenish the membrane proton gradient In the absence of respiration, cells can still make ATP through fermentation and substrate-level phosphorylation
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Chemiosmotic synthesis of ATP
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Free energy changes in the electron transport chain
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Q: In prokaryotes, where is the electron transport chain located? A. In the mitochondrial outer membrane B. In the mitochondrial inner membrane C. In a vacuolar membrane D. In the cytoplasm E. In the plasma membrane
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Glucose metabolism • C 6 H 12 O 6 + 6 O 2 + 6 H 2 O → 6CO 2 + 12 H 2 O
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Overview of eukaryotic energy pathways
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Cellular locations of energy pathways Eukaryotes Prokaryotes Cytoplasm Glycolysis Fermentation Cytoplasm Glycolysis Fermentation Pyruvate oxidation Citric acid cycle Mitochondria Inner membrane Electron transport chain Matrix Pyruvate oxidation Citric acid cycle Plasma membrane Electron transport chain
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Initial steps of glycolysis use 2 ATPs, split glucose to 2 G3P Glucose ATP ADP Hexokinase Glucose-6-phosphate Phosphoglucoisomerase Fructose-6-phosphate ATP ADP Phosphofructokinase Fructose- 1, 6-bisphosphate Aldolase Isomerase Dihydroxyacetone phosphate Glyceraldehyde- 3-phosphate 1 2 3 4 5 Aldolase Isomerase Fructose- 1, 6-bisphosphate Dihydroxyacetone phosphate Glyceraldehyde- 3-phosphate 4 5
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Q: In the first reaction of glycolysis, hexokinase couples phosphorylation of glucose to hydrolysis of ATP. The phosphorylation of glucose has a free energy change of
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Metabolic pathways 3 8 10 - Metabolic pathways A membrane...

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