AP BIOLOGY

Detailed explanation-1: -The ETC is a collection of proteins bound to the inner mitochondrial membrane and organic molecules, which electrons pass through in a series of redox reactions, and release energy. The energy released forms a proton gradient, which is used in chemiosmosis to make a large amount of ATP by the protein ATP-synthase.

Detailed explanation-2: -Electron transport chain (ETC) occurs in the inner mitochondrial membrane, where the OXPHOS takes place through the action of ATP synthase, [37].

Detailed explanation-3: -In eukaryotes, the electron transport chain is located in the inner mitochondrial membrane. In prokaryotes, it is located within the plasma membrane.

Detailed explanation-4: -The electron transport chain activity takes place in the inner membrane and the space between the inner and outer membrane, called the intermembrane space.

Detailed explanation-5: -The inner membrane is where oxidative phosphorylation takes place in a suite of membrane protein complexes that create the electrochemical gradient across the inner membrane, or use it for ATP synthesis.