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Cellular Respiration

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CP Ch 7, TC 5.3

CP Ch 7, TC 5.3

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  • 1. Cellular Respiration
  • 2. Cellular Respiration
    • This biochemical process is the slow, controlled breakdown of food for energy.
    • This biochemical pathway changes dramatically depending on the presence or absence of oxygen
  • 3. Glycolysis
    • The splitting of glucose
    • First Step
    • Common to both pathways
    • Requires the input of 2ATP, but results in 4 ATP and 2NADH+
  • 4. In the Absence of Oxygen
    • Fermentation is the conversion of pyruvate to either lactic acid or alcohol.
    • Must take place in order to continue ATP synthesis from glycolysis
  • 5. In the Presence of Oxygen
    • Greatly increased efficiency
    • Krebs Cycle
    • Electron Transport Chain
  • 6. Krebs Cycle
    • 3 Carbon Pyruvate enters
    • Pyruvate combines with Acetyl CoA
    • CO2, one ATP, 10 NADH+, 2 FADH2
  • 7. Electron Transport Chain
    • Uses the electron carriers produced in glycolysis and the Krebs cycle
    • Pumps H+ ions across the membrane, against the concentration gradient
    • Every electron transfer provides enough energy to pump H+ ions
  • 8.  
  • 9. Another view of the ETC
  • 10. Total Energy Production
    • 38 total ATP in the presence of oxygen
    • 2 total ATP from fermentation
  • 11.
    • http://instruct1.cit.cornell.edu/courses/biomi290/ASM/glycolysis.dcr
    • http://vcell.ndsu.nodak.edu/animations/etc/movie.htm