Practice question
Question
In yeast, under anaerobic conditions, pyruvate is fermented to ethanol through two steps : decarboxylation of pyruvate to acetaldehyde and NADH-mediated reduction of acetaldehyde to ethanol. The mammalian liver also expresses alcohol dehydrogenase (Liver ADH: L-ADH). From the options given below, choose the one that best explains the physiological significance of L-ADH in the absence of fermentation in the liver.
Explanation
Analysis of in yeast, under anaerobic conditions, pyruvate is shows The direction of L-ADH reaction varies with the relative con represents established outcome. functional assays supports option A, whereas distractors confuse substrate or regulatory direction and fail to reproduce observed results.
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