Glycolysis is The multistep chemical breakdown of a molecule of glucose into two molecules of pyruvic acid; the first stage of cellular respiration in all orgasnisms; occurs in the cytoplasmic fluid. It starts with breaking down glucose (1 molecule - 6 ) into pyruvate (2 molecule - 3), producing a small amount of ATP. It then goes into the citric acid cycle which occurs in the mitochondria. It completes the breakdown of glucose, producing CO2
and a small amount of ATP. Also it supplies the next step with electrons. It then uses the energy released by electrons "falling" down the electron transport chain to pump H+
across a membrane, which harnesses the energy of the H+
gradient through chemiosmosis, producing a lot of ATP (Final Product).
* Glycolysis actually ends after pyruvic acid forms, before it enters the mitochondria.