Oxidative phosphorylation is

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(D) Oxidative phosphorylation is the synthesis of energy-rich $ATP$ molecules using the energy liberated during the oxidation of reduced coenzymes $(N

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formation of $ATP$ by energy released from electrons removed during substrate oxidation.

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(D) Oxidative phosphorylation is the synthesis of energy-rich $ATP$ molecules using the energy liberated during the oxidation of reduced coenzymes $(NADH, FADH_2)$ produced during respiration.The enzyme required for this synthesis is called $ATP$ synthase.It is located in the $F_1$ headpiece of the $F_0-F_1$ complex (elementary particles) present in the inner mitochondrial membrane.The $F_1$ particle is capable of $ATP$ synthesis.$ATP$ synthase becomes active in $ATP$ formation only when there is a proton gradient with a higher concentration of $H^+$ ions on the $F_0$ side compared to the $F_1$ side.This concentration difference creates an electric potential across the mitochondrial membrane.The proton gradient and membrane electric potential together form the proton motive force $(PMF)$.The flow of protons through the $F_0$ channel induces the $F_1$ particle to function as $ATP$ synthase.The energy of the proton gradient is used to attach a phosphate group to $ADP$ via a high-energy bond,producing $ATP$.

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