CELL RESPIRATION
OXIDATIVE PHOSPHORYLATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Direct transfer of phosphate from a substrate molecule to ADP
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An electrochemical gradient across the inner mitochondrial membrane
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A membrane bound ATP synthase
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A proton motive force
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Detailed explanation-1: -Answer: Direct transfer of phosphate from a substrate molecule to ADP is not a feature of oxidative phosphorylation. Therefore, the correct answer would be A) Direct transfer of phosphate from a substrate molecule to ADP.
Detailed explanation-2: -Oxidative phosphorylation is made up of two closely connected components: the electron transport chain and chemiosmosis. In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient.
Detailed explanation-3: -Oxidative phosphorylation, the process where electron transport from the energy precursors from the citric acid cycle (step 3) leads to the phosphorylation of ADP, producing ATP. This also occurs in the mitochondria.
Detailed explanation-4: -Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP by the transfer of a phosphate group from a substrate directly to ADP or GDP. Transferring from a higher energy (whether phosphate group attached or not) into a lower energy product.