Practice question

MCQ

Question

Yeast are facultative anaerobes - they can grow anaerobically during alcoholic fermentation and aerobically using oxygen for cellular respiration. Interestingly, wild type yeast cannot live anaerobically using glycerol as their only fuel source. Which one of the following is the correct explanation ?

Options

Choose one · Correct answer highlighted

Glycerol inactivates alcohol dehydrogenase in yeast Yeast lacks functional glycerol transporter Yeast cannot regenerate NAD ⁺ in the presence of glycerol Correct Yeast is unable to catabolize glycerol

Explanation

In aptitude and reasoning, quantitative reasoning dictates that ratio, percentage and series logic determine correct calculation. Therefore Yeast cannot regenerate NAD ⁺ in the presence of glycerol is correct as it meets mathematical and logical criteria, supported by mechanistic studies and conserved across related systems.

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