<P>--- 2 Pyruvic Acid + 2 CoA → 2 Acetyl CoA + 2 Carbon Dioxide + 2 Hydrogen </P> <P> 3 . Krebs Cycle: </P> <P>--- 2 Acetyl CoA + 3 O2 → 6 Hydrogen + 4 Carbon Dioxide + 2 ATPs </P> <P> 4 . Electron Transport System: </P>

Where does the oxygen go in cellular respiration