Fermentation

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Fermentation

  1. 1. Fermentation
  2. 2. Aerobic/anaerobic • Takes place in the cytoplasm. • Fermentation is what happens if there is an absence of oxygen after glycolysis, either it proceeds with the Krebs cycle(aerobic) or fermentation(anaerobic). *Anaerobic doesn’t mean no oxygen when involving cells it just means there is not a sufficient amount of oxygen.
  3. 3. Alcohol fermentation • Pyruvate is changed into ethanol in two steps.
  4. 4. STEP 1 • The release of CO2 from the pyruvate, which is than converted into two carbon compound acetaldehyde.
  5. 5. STEP 2 • Acetaldehyde is than reduced by NADH to ethanol, which than regenerates the supply of NAD needed for ethanol.
  6. 6. Lactic acid fermentation
  7. 7. • Pyruvate is reduced directly by NADH to end up making lactate as a waste product and no release of CO2.
  8. 8. • Human cells make lactic acid when there body is either low or lacking oxygen. The muscle than begins to fatigue and feel painful.

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