Question

In class today we learned how much ATP could be made using the energy released by the reduction of O2 by
NADH. Now do the same thing but showing how much ATP can made from the reduction of O2 by FADH2! HINT:use the redox table 

Answer 1

Standard Reduction Potentials

FAD + 2H⁺ + 2e^---> FADH₂       -0.22

1/2 O₂ + 2H⁺ + 2e^---> H₂O       0.82

Using Nernst Equation

∆Go= - n F∆Eo        being ∆Eo= 0.82 – (-0.22) = 1.04 V

∆Go= -2 x 23.060kcal/volt x 1.04= -47.9 kcal/mol of FADH₂

ATP needs 7,3 Kcal/mol

SO= 47.9/7.3= 6.5 ATP in theory, its important to note that this do not happen because the body has 40% of efficency in it´s best, so it makes only 2.5 ATP per FADH₂