We inhale oxygen when we breath and exhale CO2. What is the oxygen used for and where does the CO2 come from?
a) The oxygen is used during the electron transport phase of cellular respiration. The CO2 we exhale is formed during the citric acid cycle when the bonds in carbon compounds are broken.
b) The oxygen is used as an energy source for our cells. The CO2 is produced by the ATP synthase.
c) The oxygen is used during glycolysis to break down glucose. CO2 is produced as glucose is broken down.
d) The CO2 is used during electron transport as a final electron acceptor. Oxygen is produced during the citric acid cycle.
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We inhale oxygen when we breath and exhale CO2. What is the oxygen used for and where does the CO2 c...
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