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BIOLOGY

JAMB 2004 - Question 18

Biology 2004 JAMB Past Questions - Question 18: The anaerobic fermentation of a glucose molecule yields

Choose the most appropriate option for the gap .

The anaerobic fermentation of a glucose molecule yields

A: 38 ATP molecules

B: 2 ATP molecules and alcohol

C: pyruvic acid and alcohol

D: water and carbon (IV) oxide

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Correct Answer

Explanation

B - Anaerobic fermentationoccurs in some bacteria, yeast' and germinating seeds where glucose ispartially broken down to pyruvic acid during glycolysis. The pyruvic acid is inturn oxidised in the absence of oxygen to release ethanol (an alcohol) andtwo molecules of AT P.Aerobicrespiration yields 38 molecules of ATP, carbon IV oxide and water