Question

In anaerobic respiration, pyruvate does not enter the Krebs cycle but instead undergoes 'fermentation'. Which of the following is NOT a possible product of this process? (A) (B) (C) Ethanol Lactic acid Oxidized NAD Reduced NAD

Answer 1

The correct answer is (C) Oxidized NAD. In anaerobic respiration, pyruvate can undergo fermentation. During fermentation, pyruvate is converted into either ethanol or lactic acid, depending on the organism. The process of fermentation also involves the conversion of NADH to NAD+. Therefore, the possible products of this process are ethanol or lactic acid, but not oxidized NAD.