How is electron energy used in oxidative phosphorylation? Why is this process so called? What are the structures of mitochondria

How is electron energy used in oxidative phosphorylation? Why is this process so called? What are the structures of mitochondria in which cyclic reactions and oxidative phosphorylation occur? Which of these reactions will go with greater speed?

Oxidative phosphorylation, the synthesis of ATP from adenosine diphosphate and inorganic phosphate, carried out in living cells, due to the energy released during the oxidation of org. substances in the process of cellular respiration.
In animals, plants, and fungi, oxidative phosphorylation occurs in specialized subcellular mitochondrial structures; in bacteria, the enzyme systems that carry out this process are located in the cell membrane.

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