CELL RESPIRATION
OXIDATIVE PHOSPHORYLATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The electron transport chain pumps protons regardless of the permeability of the membrane.
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So water continues to be formed
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ATP synthase depends on proton gradient to form ATP
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A leaky membrane reduces the gradient of hydrogen, thus less ATP is formed, increasing the levels of inorganic phosphate in the mitochondrial matrix
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Detailed explanation-1: -Answer and Explanation: If the inner mitochondrial membrane was permeable to H+ the production of ATP would decrease. During cellular respiration, electrons extracted from glucose are brought to the electron transport chain in the mitochondria membrane.
Detailed explanation-2: -When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the creation of proton-motive force (d is correct). The proton-motive force describes the force created by the tendency of hydrogen ions to move down their concentration gradient.
Detailed explanation-3: -Hydrogen ions in the matrix space can only pass through the inner mitochondrial membrane through a membrane protein called ATP synthase. As protons move through ATP synthase, ADP is turned into ATP. The production of ATP using the process of chemiosmosis in mitochondria is called oxidative phosphorylation.
Detailed explanation-4: -Explanation: There is an increased ATP production if the levels of hydrogen ions increase in the inter-membrane space of the mitochondria.