Following the citric acid cycle but before the electron transport chain and oxidative phosphorylation, how much potential energy has been transferred to the bonds of ATP (at 7.3 kcal/mol)? The bonds of NADH (at 53 kcal/mol)?
If glucose oxidation to CO2 and H2O
has a G of 676 kcal/mol, what proportion has been captured? Where would you predict the
balance of the free energy has gone?
What will be an ideal response?
ATP: 4 ATP @ 7.3 kcal = 29.2 kcal. 29.2/676 = 4.3% (0.043)
NADH: 2 + 2 + 6 = 10 NADH @ 53 kcal = 530 kcal. 530/676 = 78.4% (0.784)
balance in FADH2 and losses to heat/entropy.
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