1 glucose molecule (6-carbon) to pyruvate (two 3-carbon molecules).
net energy production: 2 ATP.
Pyruvate is then oxidised to acetyl coenzyme A (generating 2 NADH per pyruvate molecule), which then enters the Krebs cycle (citric acid cycle).
Krebs cycle (citric acid cycle)/ mitochondria
produces 2 ATP, 8 NADH and 2 FADH2 per glucose molecule.
electron transport phosphorylation/ mitochondria
break down NADH and FADH2 and pump H+ into the outer compartment of the mitochondria.
Net energy production is 36 ATP
pyruvate is reduced to NAD producing 2 ATP.