| Most organic substances react with oxygen exothermically, but are quite stable, because the activation energy to do so is so large. |
| Some bacteria are able to switch from enzymes using oxygen as a terminal electron acceptor to enzymes using alternative electron acceptors. |
| It obeys the law of conservation of mass since the amount of phosphorous and oxygen remains the same throughout the reaction. |
| The major role of red cells is to transfer oxygen from the lungs to the tissues. |
| His throat burned for oxygen and he felt his ribs compressing, compacting, and ready to break. |
| Xanthine oxidase uses molecular oxygen as an electron acceptor, resulting in the formation of superoxide radicals. |
