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Question: ATP synthesis is driven by transfer of electrons from
metabolized substrates such as glucose to o…


ATP synthesis is driven by transfer of electrons from
metabolized substrates such as glucose to ox ygen in humans. In
mitochondria NAD/NADH is the electron transfer agent starting from
pyruvate, or TCA cy cle intermediates. Cytochrome oxidase uses
oxygen to yield water atthe final stage. The overall voltage
available to make ATP, under standard state conditions isabout 1.1
volts. What would be the equilibrium ratio of NAD/NADH at a voltage
of + 0.8(potential of the cytochrome oxidase) if the standard
potential of the NAD/NADH couple is -0.3 V. Calculate the delat G
naught’ for this overall reaction, assuming a 1.1 V potential. Show
calculations

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