Question: Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP).

Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP). The body uses ATP as an energy source to drive other reactions. (Section 19.7) At pH 7.0 the following reduction potentials pertain to this oxidation of CyFe2+:

(a) What is Î”G for the oxidation of CyFe2+ by air?
(b) If the synthesis of 1.00 mol of ATP from adenosine diphosphate (ADP) requires a Î”G of 37.7 kJ, how many moles of ATP are synthesized per mole of O2?

02(g) 4 H (a)4e2 H2) Eed+0.82 V aq) e> red+0.22 V

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