CELL RESPIRATION
OXIDATIVE PHOSPHORYLATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Membrane energy
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Protonic energy
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Potential energy
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Kinetic energy
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Potential energy is the stored energy of objects in a certain position.
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Detailed explanation-1: -Such direct transfer of high-energy phosphate groups does not occur during electron transport. Instead, the energy derived from electron transport is coupled to the generation of a proton gradient across the inner mitochondrial membrane.
Detailed explanation-2: -The electrochemical proton gradient across the inner mitochondrial membrane is used to drive ATP synthesis in the critical process of oxidative phosphorylation (Figure 14-14). This is made possible by the membrane-bound enzyme ATP synthase, mentioned previously.
Detailed explanation-3: -Answer and Explanation: The primary consequence of a proton gradient in cells is the production of ATP. In mitochondria, the electron transport chain (ETC) complexes in mitochondria receive an electron from an electron donor and transfer these electrons to different electron receivers.
Detailed explanation-4: -The electrons from from NADH and FADH2 flow through the electron transport chain in the inner mitochondrial membrane generating a H+ buildup in the inner membrane space. This proton gradient (gradient of H+) flowing through the membrane enzyme complex ATP synthetase is the direct energy source for producing ATP.