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Cellular Respiration Aerobic •With Oxygen Anaerobic •Without Oxygen Cellular Respiration Occurs primarily in the mitochondria • Breakdown of glucose into CO2 and H20 Cellular Respiration • Glucose + Oxygen Water + Carbon dioxide + energy Cellular Respiration • Glycolysis • Aerobic Respiration –Citric Acid Cycle –Electron Transport Chain • Anaerobic Phase • 1 Glucose enters the cell • 2 Splits in half to yield 2 molecules of Pyruvic Acid • 3 Produces at end 2 ATP • 4 Enzymes remove 2 H and 2 electrons • 5 NAD+ and FAD picks them up • 6 Forms NADH and FADH • 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 Also called Krebs Cycle a. Acetyl CoA + 4C = Citric Acid b. Citric Acid – CO2 = 5C c. 5C – CO2 = 4C Releases CO2 into air • 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 • Occurs if there is no O2 after Glycolysis • Lactic Acid Fermentation • Alcoholic Fermentation •1 Glycolysis •2 Releases energy •3 Converted into ethanol or lactic acid and CO2