Plants and yeast

• Anaerobic respiration: fermentation

  A) Glucose

  B) ADP

  C) ATP

  D) 2H

  E) NADH + H+

  F) NAD

  G) 2H

  H) Ethanol

  I) Ethanal

  J) Pyruvate

  K) CO2

  
• Anaerobic respiration in plants and yeast is irreversible. This is because the CO2 is lost first
• Fermentation

  • Pyruvate is decarboxylated to produce ethanol
  • Hydrogen released during glycolysis is passed on to NAD
  • Reduced NAD then passes the hydrogen to ethanal, reduces it to ethanol
• Fermentation has a net production of 2 ATP