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
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Mitochondria Structure! Outer Membrane Intermembrane Space Inner Membrane – Cristae Matrix
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Pathway of Electron Transport
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain
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
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!!!
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Electron Transport Chain/ Ox. Phosphorylation
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ATP Synthase Rotor Stator Rod Knob (Catalytic sites)
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Certain poisons interrupt cellular respiration Figure 6.11
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Energy flow during respiration: Glucose NAD+ NADH e- transport chain = proton-motive force ATP
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Concept 9.5 Fermentation vs. Cellular respiration = Cells produce ATP without the use of oxygen
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Alcohol Fermentation 4e - 2H +
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Lactic Acid Fermentation
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Lactic Acid Fermentation 4e - 2H +
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Pyruvate is a key juncture in catabolism
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
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Concept 9.6
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
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Control of cellular respiration in glycolysis + – –