In the first three stages of cellular respiration, the chemical energy in glucose is transferred to:

Question

Quizplus · Accepted Answer

In the first three stages of cellular respiration (glycolysis, pyruvate oxidation, and the citric acid cycle), the chemical energy in glucose is transferred to electron carriers (NADH and FADH2) and ATP. This process occurs through a series of redox reactions where electrons are transferred from glucose to the electron carriers, which then transfer the electrons to the electron transport chain to ultimately generate ATP through oxidative phosphorylation. Cytochrome b and coenzyme Q are components of the electron transport chain, but they are not the primary recipients of the chemical energy from glucose. Proton pumps are also involved in the electron transport chain, but they do not directly receive the chemical energy from glucose. Therefore, B is the best choice.

In the First Three Stages of Cellular Respiration, the Chemical