Is this correct, how do u know?

"cellular respiration- way of making atp energy. cellular respiration breaks glucous down. the first step in the process takes place in the cytoplasm when glucose is transformed into pyruvate. 2 kereb cycle - in mitochondria pyruvate is converted, co2 is produced., electron chain 3 electrons are transferred and used to create proton gradient protons power enzyme called atp synthesis it takes phosphates and adds to dp which makes atp by adding phosphate, to complete oxygen must be present"