What process of cellular respiration occurs at the inner membrane of the mitochondrion?

fermentation
glycolysis
krebs cycle
electron transport chain

Electron transport chain.

Explanation:

Electron transport chain is the series of the cycle of the transfer of electrons from the one complex to other complex of the cycle. Both oxidation and redox reaction occurs in the electron transport chain.

The process of electron transport chain occurs in the inner mitochondrial membrane. All the complexes and the substrate of the cycle are embedded in the inner mitochondrial membrane. ATP is produced by this cycle located in the inner mitochondrial membrane.

Thus, the answer is electron transport chain.