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Cellular Respiration

Cellular respiration is the process of breaking down glucose into energy, CO2, and H2O. Learn about its phases - glycolysis, aerobic & anaerobic respiration, citric acid cycle, electron transport chain, and fermentation.

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Cellular Respiration

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  1. Cellular Respiration

  2. Aerobic • With Oxygen Anaerobic • Without Oxygen

  3. Cellular Respiration Occurs primarily in the mitochondria • Breakdown of glucose into CO2 and H20

  4. Cellular Respiration • Glucose + Oxygen  Water + Carbon dioxide + energy

  5. Cellular Respiration • Glycolysis • Aerobic Respiration • Citric Acid Cycle • Electron Transport Chain

  6. Glycolysis • Anaerobic Phase • 1 Glucose enters the cell • 2 Splits in half to yield 2 molecules of Pyruvic Acid • 3 Produces at end 2 ATP

  7. Glycolysis • 4 Enzymes remove 2 H and 2 electrons • 5 NAD+ and FAD picks them up • 6 Forms NADH and FADH

  8. Aerobic Phase of Respiration • 1. O2 and Pyruvic acid enter the mitochondria • 2 Pyruvic Acid breaks down into CO2 and Acetic Acid • 3. Acetyl CoA forms • Acetic Acid + coenzyme A

  9. Citric Acid Cycle Also called Krebs Cycle a. Acetyl CoA + 4C = Citric Acid b. Citric Acid – CO2 = 5C c. 5C – CO2 = 4C Releases CO2 into air

  10. Electron Transport Chain • a. Electrons from NADH and FADH are passed down a series of reactions • Makes 34 molecules of ATP • b. H from NADPH and FADH joins together with O2 (from which we breathe out) to form H2O

  11. Fermentation • Occurs if there is no O2 after Glycolysis • Lactic Acid Fermentation • Alcoholic Fermentation

  12. Fermentation • 1 Glycolysis • 2 Releases energy • 3 Converted into ethanol or lactic acid and CO2

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