B) respiration uses O2, but fermentation does not
C) respiration uses glucose, but fermentation does not
D) respiration stores energy in the form of starch or glycogen, but fermentation does not
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The correct answer here is B. Let's look at each choice in turn.
A is incorrect. A full cycle of cellular respiration complete with oxidative phosphorylation produces over 30 ATP. Fermentation produces much less per cycle.
B is correct. Respiration uses oxygen (O2) as the ultimate electron receptor to produce water (H2O). Fermentation does not utilize oxygen. Instead, carbon dioxide (CO2) is produced as an off gas.
C is incorrect. Both processes use glucose as the starting point for energy production.
D is incorrect. Both processes store energy formed in the form of ATP which is not a type of starch.
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