What are the four pathway tnat occure during respiration?

The four pathways that occur during respiration are glycolysis, the Krebs cycle (or citric acid cycle), the electron transport chain, and oxidative phosphorylation. Glycolysis breaks down glucose into pyruvate, producing a small amount of ATP. The Krebs cycle processes pyruvate to generate electron carriers NADH and FADH2, which then feed into the electron transport chain. Finally, the electron transport chain uses these carriers to create a proton gradient that drives ATP synthesis through oxidative phosphorylation.