Water is one of the products of aerobic cellular respiration. What is the source of the oxygen atom utilized to create the water molecules? a) Carbon dioxide (CO 2 ). b) Glucose (C 6 H 12 O 6 ). c) Oxygen gas (O 2 ). d) Pyruvate (C 3 H 3 O 3 – ).

Okay, everyone. Water is one of the products of aerobic cellular respiration. What is the source of the oxygen atom utilized to create the water molecules? Okay. This is a pretty interesting question. You really gotta wrap your brain around, where is the water created in aerobic cellular respiration? Remember that it's created in the very last stages of the electron transport chain. Remember that water is created when oxygen atoms are given the electrons. Remember that oxygen is the final electron acceptor of the electron transport chain. And whenever it accepts those electrons and some hydrogen atoms, it becomes water molecules. So that's why water is a byproduct of aerobic cellular respiration. Now they wanna know where do those oxygen atoms come from? Well, remember that we've already kinda talked about this. This is why we have to breathe in oxygen to do our cellular respiration. And in fact, the source of oxygen in cellular respiration is just simply oxygen gas from the atmosphere that you breathe into your body. The correct answer here is answer choice c. While all these other answers do have oxygen in them, the source of oxygen as the final electronic acceptor for the electron transport chain is just simply oxygen gas. And then when it accepts those electrons, it becomes water molecules. Okay, everyone. Let's move on to our next video.