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What is Cellular Respiration?

What is Cellular Respiration?. energy. When organisms release the _________ stored in carbohydrates and other food molecules. Glucose Fructose Monosaccharides. Sucrose: A disaccharide. Aerobic Respiration. Occurs when Oxygen is present Many ATP Molecules made.

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What is Cellular Respiration?

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  1. What is Cellular Respiration? energy • When organisms release the _________ stored in carbohydrates and other food molecules Glucose Fructose Monosaccharides Sucrose: A disaccharide

  2. Aerobic Respiration • Occurs when Oxygen is present • Many ATP Molecules made

  3. Anaerobic Respiration • Occurs when no Oxygen is present • Very little ATP made • Two basic types: • Fermentation: Alcohol and CO2 produced • Lactic Acid

  4. What did Krebs and Chance Discover in their Research? • Enjoy this video clip, and jot down a summary of Krebs’ and Chance’s research. • Pay attention to the significance of both scientist’s discoveries.

  5. Label the parts of the mitochondrion Inner membrane Outer membrane Inter-membrane space Cristae Matrix

  6. 3 stages of Cellular Respiration • Glycolysis: • Occurs in the cytoplasm • No O2 required • Krebs Cycle: • Occurs in the mitochondrion • Electron Transport Chain • Requires O2

  7. “Glyco” “lysis” literally means “sugar” “splitting” ATP ATP ADP ADP P P ATP = -2

  8. P P Glycolysis takes place in the cytoplasm NAD+ NADH P NAD+ NADH P NADH = +2

  9. P P Glycolysis takes place in the cytoplasm ATP ADP P ATP ADP P ATP = +2

  10. Glycolysis takes place in the cytoplasm ATP ADP P ATP Pyruvate ADP P ATP = +2

  11. What is the net gain of energy in Glycolysis? • ATP = + 2 • NADH = + 2

  12. The Krebs Cycle takes place in the Matrix of the Mitochondrion NAD+ NADH CoA Acetyl CoA NAD+ NADH CoA

  13. The Krebs Cycle takes place in the Matrix of the Mitochondrion CoA Citrate

  14. The Krebs Cycle takes place in the Mitochondrion NAD+ NADH

  15. The Krebs Cycle takes place in the Mitochondrion NAD+ NADH

  16. The Krebs Cycle takes place in the Mitochondrion ATP ADP NADH NAD+ P

  17. The Krebs Cycle takes place in the Mitochondrion FADH FADH2

  18. What is lost during the Krebs Cycle? A Carbon atom must be lost It is lost in the form of Carbon Dioxide There are 3 CO2 molecules lost What is gained during the Krebs Cycle? 4 NADH molecules are made. 1 FADH2 molecule is made 1 ATP molecule is made What is gained and lost for each pyruvate molecule?

  19. NADH = +4 ATP = +1 FADH2 = +1 But there were two molecules of Acetyl CoA (per glucose) that went into the Krebs Cycle… How many would actually be produced in this case? What is gained per glucose molecule? +8 +2 +2

  20. Where is the energy? • So far, most of the usable energy from the original glucose molecule is stored as electrons in and • Where will most of the ATP be made? The Electron Transport Chain FADH2 NADH

  21. Where is the Electron Transport Chain? Inside the mitochondrion. Folds of the inner membrane known as cristae. Many ATP molecules willbe produced in these Electron Transport Chains

  22. How much ATP can each electron carrier make? ATP ATP NADH ATP ATP FADH2 ATP FADH2 FADH2

  23. After electrons travel through the ETC, Oxygen is the final electron acceptor. Electrons, and two Hydrogen ions attach to the oxygen, and H2O is formed.

  24. Hydrogen ions pump from the matrix to the inter- membrane space, using the energy from the electrons.

  25. The diffusion of H+ ions through the enzyme, ATP synthase makes ATP

  26. C6H12O6 ATP

  27. C6H12O6 CO2 H2O ATP

  28. ATP C6H12O6 O2 CO2 H2O + + +

  29. Photosynthesis and Respiration • With a neighbor, fill in the steps in this cycle of Photosynthesis and Respiration. • We will check your answers when you are done!

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