Why is cellular respiration organized into four phases?
A)So that the energy within the glucose molecule can be released in a stepwise fashion.
B)So that it can take place within different cells.
C)So that most of the energy can be released as body heat.
D)So that oxidation can occur without reduction.
E)So that the body can make energy from different substrates.

Question

Quizplus · Accepted Answer

Cellular respiration is organized into four phases (glycolysis, pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation) so that the energy within the glucose molecule can be released in a stepwise fashion, allowing for the efficient extraction of energy and the production of ATP. This stepwise process also ensures that the process of oxidation can occur without reduction, preventing the release of energy in an uncontrolled manner. Additionally, this organization allows for the body to make energy from different substrates, not just glucose.

Why Is Cellular Respiration Organized into Four Phases