Cellular respiration 4

Cellular respiration 4

1. Anaerobic respiration takes place in the absence of oxygen. Unlike aerobic respiration the NADH is oxidised by fermentation, a process in which no more ATP molecules are generated.

2. Fermentation; in the absence of oxygen, the pyruvate generated by glycolysis can follow one of two metabloic pathways; alcoholic fermentation, lactate fermentation

3. Alcoholic fermentation; occurs in plants and yeast that are expiring anaeorbically

   • Glucose (6C)
     • 2 pyruvate (3C)
       • 2 Ethanol (2C)
       • 2 CO2
       • Glycolysis
     • Glycolysis

4. Lactate fermentation; occurs in animals that are respiring anaerobically

   • Glucose (6C)
     • 2 pyruvate (3C)
       • 2 lactate (3C)

5. Anaerobic

   • does not require O2
     • Involves glycolysis
       • Generates small amounts of ATP quickly
         • Takes place in cytoplasm

6. Aerobic

   • Requires O2
     • Involves gylcolysis, link reaction, krebs and ETC
       • Generates large amounts of ATP slowly
         • Takes place in cytoplasm and mitrochondria