AP BIOLOGY

Detailed explanation-1: -The mitochondrion has an outer membrane and an inner membrane with folds called as cristae. The electron transport chain is a series of transmembrane proteins found in the inner membrane.

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: -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-4: -Note: The electron transport system occurs in the cristae which are infoldings of the inner membrane of the mitochondria. The cristae contain several enzymes that facilitates to create a electro potential gradient and finally oxidative phosphorylation takes place and ATP molecules are synthesized.

Detailed explanation-5: -The electron transport chain activity takes place in the inner membrane and the space between the inner and outer membrane, called the intermembrane space.