Which redox reaction(s) will NOT proceed as written if the initial concentrations of reactants and products are equal? I. pyruvate + NADH $\rightarrow$ lactate + NAD⁺
II. FADH₂ + NAD⁺ $\rightarrow$ FAD + NADH + H⁺
III. succinate + NAD⁺ $\rightarrow$ fumarate + NADH + H⁺
IV. NADH + H⁺ + ubiquinone $\rightarrow$ NAD⁺ + ubiquinol
V. cytochrome c-Fe³⁺ + cytochrome b-Fe²⁺ $\rightarrow$ cytochrome c-Fe²⁺ + cytochrome b-Fe³⁺

Question

Which redox reaction(s) will NOT proceed as written if the initial concentrations of reactants and products are equal? I. pyruvate + NADH

\rightarrow

lactate + NAD⁺
II. FADH₂ + NAD⁺

\rightarrow

FAD + NADH + H⁺
III. succinate + NAD⁺

\rightarrow

fumarate + NADH + H⁺
IV. NADH + H⁺ + ubiquinone

\rightarrow

NAD⁺ + ubiquinol
V. cytochrome c-Fe³⁺ + cytochrome b-Fe²⁺

\rightarrow

cytochrome c-Fe²⁺ + cytochrome b-Fe³⁺

Quizplus · Accepted Answer

The Answer of Which redox reaction(s) will NOT proceed as written if the initial concentrations of reactants and products are equal? I. pyruvate + NADH $\rightarrow$ lactate + NAD⁺ II. FADH₂ + NAD⁺ $\rightarrow$ FAD + NADH + H⁺ III. succinate + NAD⁺ $\rightarrow$ fumarate + NADH + H⁺ IV. NADH + H⁺ + ubiquinone $\rightarrow$ NAD⁺ + ubiquinol V. cytochrome c-Fe³⁺ + cytochrome b-Fe²⁺ $\rightarrow$ cytochrome c-Fe²⁺ + cytochrome b-Fe³⁺ A) I and IV B) I, IV, and V C) II D) II and III E) IV and V

Which Redox Reaction(s) Will NOT Proceed as Written If the Initial