Accurate statements Inaccurate statements Answer Bank ATP synthase uses energy from ATP to move H+ into the mitochondrial matrix. The pH in the intermembrane space is higher than the pH in the mitochondrial matrix. Hydrogen ions cannot freely pass through the inner mitochondrial membrane. H+ concentration is lower in the mitochondrial matrix than in the intermembrane space. Energy is generated as a result of the difference in hydrogen ion concentration between the mitochondrial matrix and the cytoplasm. Oxidative phosphorylation relies on the H+ gradient generated by the electron transport chain.
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ATP synthase attaches a phosphate group to ADP, forming ATP. This process requires energy. The energy is provided by electron carrier molecules in the electron transport system that pump protons (H+ ions) into the intermembrane space (also called outer compartment). When these move back into the mitochondrial matrix, they must move through ATP synthase. This movement through ATP synthase provides the power needed by ATP synthase to push the third phosphate group onto ADP.
Madhur L.
The energy for ATP synthesis is generated by the movement of protons from the ______________ side of the inner mitochondrial membrane establishing a(an) _____________ gradient. -intermembrane; electrical potential -None of the answers is correct. -matrix; pH -matrix; sodium ion -intermembrane; pH
The generation of ATP by ATP synthase is a massively endergonic reaction, driven by the concentration gradient of H+ ions across the inner membrane of the mitochondria, generated by the electron transport chain. The energy to pump H+ into the inter-membrane space is a result of the electrons transferred at every step of the chain.
Adi S.
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