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Chapter 8: Cellular Energetics

Learn about ATP, the universal energy currency in organisms, and the key processes of glycolysis, fermentation, and cellular respiration that contribute to ATP production. Explore the role of the electron transport chain and how it generates ATP.

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Chapter 8: Cellular Energetics

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  1. Chapter 8: Cellular Energetics Feb. 21, 2005 Holly Gasal

  2. ATP • ATP is a universal energy currency found in all types of organisms. • Glycolysis, cellular respiration and photosynthesis are the 3 main sources of ATP.

  3. Glycolysis • The initial step of glucose metabolism occurs in the cytosol of the cell. • Glucose is converted to pyruvate by 10 water soluble enzymes.

  4. Fermentation - Anaerobic metabolism

  5. Cellular Respiration

  6. Electron Transport chain

  7. F1 (ATPase) portion of the complex is responsiblefor ATP production F0 portion acts as a proton channel. ATP synthesis using proton motive force

  8. Conclusion • ATP is the universal energy of all organisms. • Glycolysis – the initial step in glucose metabolism – yields 2 ATP, 2 NADH, and 2 pyruvate molecules. • Fermentation is the further metabolism of pyruvate in the absence of oxygen. • Cellular respiration consists of the further metabolism of glucose in the presence of oxygen through the citric acid cycle. • The electron transport chain produces a proton gradient which drives the production of ATP by the F0F1complex.

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