NAD NADH 2 H2H2H2H2 H2H2H2H2

Acetyl Co-A Co-A Co-AAcetylAcetyl

C 6 H 12 O 6 + 6O 2 ATP 6CO 2 + 6H 2 O + ATP

Glucose 2 Pyruvate 2 ADP 2 ATP NAD NADH 2 Aerobic pathway To electron transport chain Anaerobic pathway Anaerobic

Pyruvate (C 3 ) Acetyl Co-A (C 2 ) Co-A The Kreb’s Cycle 2NADH 2 CO 2

Acetyl Co-A (C 2 ) Citric Acid (C 6 ) C5C5C5C5 C4C4C4C4 CO 2 NAD NAD NADH 2 ADP ATP To electron transport chain

Pyruvate + NAHD 2 ethanol + Carbon dioxide + NAD + 2 ATP Quite common in bacteria, fungi such as yeast, and the seeds of some plants e.g. peas

Pyruvate + NAHD 2 lactic acid + NAD + 2 ATP

Glucose Pyruvate Lactic AcidEthanol + Carbon Dioxide NADH 2 NAD NAD 2ADP 2ATP Plants Animals