Chapter 23, Problem 23.82EP

Interpretation Introduction

Interpretation: To determine the change that occurs to electron energy as electrons pass through the electron transport chain.

Concept introduction: Electron transport chain is a sequence of biochemical reactions in which electrons and hydrogen atoms from NADH and FADH₂are transferred to various intermediate carriers and finally reacted with molecular oxygen and leads to the formation of water. The reaction of oxidation of NADH and FADH₂ is:

$\begin{array}{c}\text{NADH}+{\text{H}}^{+}\to {\text{NAD}}^{+}+2{\text{H}}^{+}+2{\text{e}}^{-}\\ {\text{FADH}}_2\to \text{FAD}+2{\text{H}}^{+}+2{\text{e}}^{-}\end{array}$