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Today- Start Chapter 9 Announcements

This chapter discusses the process of energy flow and ATP production in cellular respiration. Topics include glycolysis, citric acid cycle, electron transport chain, and chemiosmosis. Learn about the importance of ATP in cellular processes and the different types of fermentation. Don't miss the quiz deadline and drop date reminder!

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Today- Start Chapter 9 Announcements

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  1. Today- Start Chapter 9 • Announcements Chapter 8 quiz on WebCT is due Sunday, March 19. Do it before you leave for spring break. No excuses !!!!! Final Day to drop a class is Friday, March 17.

  2. Warm up Questions 1, 2, 3 1. What structure is this? 2. What does the symbol Pi or P represent? 3. What does ADP stand for?

  3. Chapter 9 Pictures

  4. Carbon and Energy Flow Heat energy CO2 + H2O Light energy Photosynthesis Carbs Proteins Lipids + O2 Cellular (Aerobic) Respiration (ATP Produced)

  5. Fig 9.2

  6. Digestion + Cellular Respiration =ATP Production

  7. Frig 8.11 Why do cells need ATP?

  8. Oxidation releases energy which is stored as ATP organic Simpler waste molecules products (from food) (CO2 +H2O) ATP (energy storage molecule) + Heat oxidation Energy Released

  9. EA

  10. Questions 9.1-9.2

  11. Fig 9.19 Digestion Cellular Respiration

  12. Fig 9.6. Glycolysis

  13. Fig 9.6 Formation of Acetyl CoA and the Citric Acid Cycle Acetyl CoA Formation

  14. Fig 9.6 Electron Transport and Chemiosmosis Acetyl CoA Formation

  15. Fig 9.7 Substrate-level Phosphorylation

  16. Fig 9.14. Oxidative Phosphorylation = Making ATP using Electron Transport and Chemiosmosis NADH + FADH2

  17. Fig 9.8 Overview of Glycolysis

  18. Energy Investment Phase (2 Glyceraldehyde-3-P) Energy Payoff Phase

  19. Glycolysis: Energy Investment Phase 2 Glyceraldehyde-3-P

  20. Energy Investment Phase (2 Glyceraldehyde-3-P) Energy Payoff Phase

  21. Redox Reactions 2 electrons and 1 proton = hydride ion = H-1 NAD is an electron carrier in the cell.

  22. electrons Step 1 of the Energy Payoff Phase 2 Glyceraldehyde-3-Phosphates Oxidation of sugar 2 e- removed from each glyceraldehyde-3 - P “Redox” reaction (reduction-oxidation) Reduction of NAD Each NAD+ has gained 2 e- in the form of “H-” =hydride ion. Produces NADH electrons

  23. Glycolysis: Energy Payoff Phase 2 Glyceraldehyde-3-P

  24. Glycolysis Summary Glucose Energy Investment Phase 2 ATP 2 ADP 4 ATP 4 ADP Energy Payoff Phase 2 NADH 2 NAD+ 2 Pyruvate Glucose 2 Pyruvate + 2 H20 2 ADP + 2 Pi 2 ATP 2 NADH 2 NAD+

  25. Question 9.3

  26. Fig 9.6 Formation of Acetyl CoA Acetyl CoA Formation

  27. Fig 9.10 Formation of Acetyl CoA

  28. Fig 9.6 Citric Acid Cycle Acetyl CoA Formation

  29. Fig 9.12 Citric Acid Cycle

  30. Question 9.5

  31. Breathe out Breathe out Glucose is completely oxidized to CO2 • Glycolysis: glucose (6-C) => 2 pyruvate (3-C) • Formation of Acetyl CoA 2 pyruvate (3-C) => 2 Acetyl CoA (2-C) + 2 CO2 • Citric Acid Cycle 2 Acetyl CoA (2-C) => 4 CO2

  32. Fig 9.6 Electron Transport and Chemiosmosis Acetyl CoA Formation

  33. Fig 9.15: Electron transport and chemiosmosis Intermembrane Space (pH 7) Inner membrane (pH 8) Matrix Chemiosmosis

  34. Fig 9.15 • (Refer to figure in handout. We will use only NADH as an example.) IV III I Chemiosmosis

  35. Electron Transport Chain IV I III H+ H+ H+ Chemiosmosis

  36. Question 9.5

  37. Chemiosmosis H+ H+ pH 7 pH 8 Chemiosmosis

  38. Fig 9.14. Oxidative Phosphorylation = Making ATP using Electron Transport and Chemiosmosis NADH + FADH2

  39. Question 9.6

  40. Fig 9.18 Fermentation Overview

  41. Fig 9.17a Alcohol Fermentation

  42. Fig 9.17b Lactic Acid Fermentation

  43. Most Eukaryotes C. botulinum produces the potent nerve toxin that causes botulism.

  44. Question 9.7

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