1. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero Chapter 9 Cellular Respiration: Harvesting Chemical Energy

2. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Mitochondria Structure! Outer Membrane Intermembrane Space Inner Membrane – Cristae Matrix

3. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain

4. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Pathway of Electron Transport

5. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain

6. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain 1. NADH + FADH2 electrons  2. electron transport chain  3. O 2  4. O 2 + 2H + = H20

7. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain  5. H+ pumped through electron transport chain proteins from matrix to intermembrane space  6. H+ diffuse back into matrix through ATP Synthase = ATP!!!

8. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain/ Ox. Phosphorylation

9. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ATP Synthase Rotor Stator Rod Knob (Catalytic sites)

10. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Certain poisons interrupt cellular respiration Figure 6.11

11. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Energy flow during respiration: Glucose NAD+  NADH e- transport chain = proton-motive force ATP

12. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Concept 9.5 Fermentation vs. Cellular respiration = Cells produce ATP without the use of oxygen

13. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation

14. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation

15. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation 4e - 2H +

16. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Lactic Acid Fermentation

17. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Lactic Acid Fermentation 4e - 2H +

18. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Pyruvate is a key juncture in catabolism

19. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings The Evolutionary Significance of Glycolysis Glycolysis – Occurs in nearly all organisms – Probably evolved in ancient prokaryotes before there was oxygen in the atmosphere

20. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Concept 9.6

21. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Regulation of Cellular Respiration via Feedback Mechanisms Cellular respiration – Is controlled by an allosteric enzymes in glycolysis and the citric acid cycle

22. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Control of cellular respiration in glycolysis + – –