fermentation
TRANSCRIPT
Fermentation
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.
Alcohol fermentation• Pyruvate is changed into ethanol in two steps.
STEP 1
• The release of CO2 from the pyruvate, which is than converted into two carbon compound acetaldehyde.
STEP 2
• Acetaldehyde is than reduced by NADH to ethanol, which than regenerates the supply of NAD needed for ethanol.
Lactic acid fermentation
• Pyruvate is reduced directly by NADH to end up making lactate as a waste product and no release of CO2.
• Human cells make lactic acid when there body is either low or lacking oxygen. The muscle than begins to fatigue and feel painful.