Chapter 12.11, Problem 1QQ

Interpretation Introduction

Interpretation: To identify the species that is not a ROS.

Concept introduction: The human body inhale ${\text{O}}_{\text{2}}$ through respiration. $90\%$ of ${\text{O}}_{\text{2}}$ consumed is utilized by the electron transport chain and phosphorylation process. Some part of the remaining ${\text{O}}_{\text{2}}$ is converted into the reactive oxygen species (ROS).

Reactive oxygen species are important for the body but they have to be eliminated when they are not required.