1. Fermentation

3. 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.

4. Alcohol fermentation
• Pyruvate is changed into ethanol in two steps.

5. STEP 1
• The release of CO2 from the pyruvate, which
is than converted into two carbon compound
acetaldehyde.

6. STEP 2
• Acetaldehyde is than reduced by NADH to
ethanol, which than regenerates the supply of
NAD needed for ethanol.

7. Lactic acid
fermentation

9. • Pyruvate is reduced directly by NADH to end
up making lactate as a waste product and no
release of CO2.

10. • Human cells make lactic acid when there body
is either low or lacking oxygen. The muscle
than begins to fatigue and feel painful.