why is oxygen necessary for cellular respiration
Oxygen is needed for the Electron Transport Chain, or ETC for short. Oxygen's role in ETC is as the final acceptor of electrons.The transfer of electrons pumps hydrogen protons across the inner mitochondrial membrane through ATP Synthase and this gradient is used to synthesize energy in the form of ATP.This step produces around 30 ATP, this being the most out of all of the three steps of cellular respiration.xygen is necessary for the production of ATP, energy used by the cell in areas such as protein production and active transport. They are the final electron recipient in the E â¦ TC, using two H+ atoms to form H2O. 1 person found this useful.