AP BIOLOGY

Detailed explanation-1: -Cellular respiration consists of three metabolic phases: glycolysis, the Krebs cycle, and the electron transport chain. Glycolysis occurs in the cytosol, but the Krebs cycle and electron transport chain occur inside the mitochondria.

Detailed explanation-2: -The NADH and FADH generated during the Krebs cycle fuels the electron transport chain which drives this process, ultimately producing 38 molecules of ATP.

Detailed explanation-3: -The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.

Detailed explanation-4: -Electron transport chain (ETC) occurs in the inner mitochondrial membrane, where the OXPHOS takes place through the action of ATP synthase, [37].