Why does dnp counteract or prevent the pasteur effect

Reference no: EM1398542

In his studies of glucose metabolism by yeast, Louis Pasteur discovered that the sudden addition of oxygen (O2) to a previously anaerobic suspension of yeast in grape juice resulted in a dramatic decrease in the rate of glucose consumption. This â€œPasteur effectâ€ can be counteracted by the addition of 2,4-dinitrophenol (DNP), an uncoupler of the mitochondrial electron transport chain. (a) Why do yeast cells consume less glucose in the presence of oxygen? Can you estimate how much less glucose they use in the presence of oxygen? (b) Why does DNP counteract or prevent the Pasteur effect?

Reference no: EM1398542

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