Chapter 12, Problem 12.106EP

Interpretation Introduction

Interpretation: To define coupled reactions.

Concept introduction: Common metabolic pathway is the total sum of metabolic reactions that occur in stage third and fourth of the biochemical process or it is defined as the total sum of reactions that occur in the citric acid cycle and electron transport chain and oxidative phosphorylation.

These stages are included in the common metabolic pathway because the reactions in these stages are the same for different kinds of food.

Electron transport chain is a sequence of biochemical reactions in which electrons and hydrogen atoms from the citric acid cycle are transferred to various intermediate carriers and finally reacts with molecular oxygen to form a water molecule.

Oxidative phosphorylation is the biochemical process for the synthesis of ATP from ADP and ${\text{P}}_{\text{i}}$. The energy required for the synthesis is transferred from the electron transport chain.