What part of cellular respiration provides most of the energy?

The part of cellular respiration that provides most of the energy is the oxidative phosphorylation stage, specifically during the electron transport chain and chemiOSmosis. In this process, electrons are transferred through a series of protein complexes in the inner mitochondrial membrane, creating a proton gradient that drives ATP synthesis. This stage can yield the majority of the ATP produced during cellular respiration, making it the most energy-rich phase.