Final answer:
Protein is more efficient than fat or carbohydrate in the amount of ATP produced per unit of oxygen consumed.
Step-by-step explanation:
Protein is more efficient than fat or carbohydrate in the amount of ATP produced per unit of oxygen consumed. This statement is True.
During cellular respiration, glucose is broken down into pyruvic acid and then further processed in the mitochondria in a series of reactions that generate ATP. In this process, proteins are able to produce more ATP per unit of oxygen consumed compared to fats or carbohydrates. This is because proteins require more energy to break down and therefore provide a higher energy yield in the form of ATP when utilized for metabolism.