The reduced coenzymes NADH and FADH2 provide hydrogen ions and electrons for the following reaction: 4H⁺ + 4e⁻ + O₂ → 2H₂O. Which of the following statements is true of this reaction?

Question

Quizplus · Accepted Answer

The reduced coenzymes NADH and FADH2 provide hydrogen ions and electrons to the electron transport chain in the mitochondria, where they are ultimately used to produce ATP through oxidative phosphorylation. The given reaction is a part of this process, where the hydrogen ions and electrons are transferred from the coenzymes to oxygen molecules to form water molecule. This is an exothermic reaction as it releases energy. Also, four electrons are consumed in this reaction, as indicated by the transfer of four electrons from the left side of the equation to the right side. Therefore, option D is the correct choice.

The Reduced Coenzymes NADH and FADH2 Provide Hydrogen Ions and Electrons