Compare the efficiency of aerobic respiration and fermentation in ATP energy production. If aerobic respiration converts 40% of the available energy of glucose into ATP, then what percentage does fermentation convert to ATP?
What will be an ideal response?
Aerobic respiration produces 36 (to 38) ATPs from one glucose molecule, whereas fermentation only produces 2 ATPs from one glucose molecule. Therefore, fermentation produces only 1/18 (to 1/19th) the amount of energy. If 36 ATPs are 40% of the available energy in the six-carbon glucose molecule, then 2 ATPs would be equal to 1/18 of 40%, which is 2.2%. While aerobic respiration converts approximately 40% of the available energy of glucose to ATPs, fermentation converts approximately 2.2% of the available energy to a usable form, ATP.
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