Which statement best describes the role of H+ ions in the mitochondria during cellular respiration?Group of answer choicesH+ ions move through protein complexes of the Electron Transport Chain down their electrochemical gradient to synthesise ATPH+ ions traverse through ATP synthase from the matrix to the intermembrane space to generate an electrochemical gradientH+ ions moving through ATP synthase down their electrochemical gradient releases energy to synthesise ATPThe movement of H+ ions through protein complexes of the Electron Transport Chain directly binds ADP and phosphate to form ATP
Question
Which statement best describes the role of H+ ions in the mitochondria during cellular respiration?Group of answer choicesH+ ions move through protein complexes of the Electron Transport Chain down their electrochemical gradient to synthesise ATPH+ ions traverse through ATP synthase from the matrix to the intermembrane space to generate an electrochemical gradientH+ ions moving through ATP synthase down their electrochemical gradient releases energy to synthesise ATPThe movement of H+ ions through protein complexes of the Electron Transport Chain directly binds ADP and phosphate to form ATP
Solution
The statement that best describes the role of H+ ions in the mitochondria during cellular respiration is: "H+ ions moving through ATP synthase down their electrochemical gradient releases energy to synthesise ATP."
Here's a step-by-step explanation:
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During cellular respiration, high-energy electrons are passed along the electron transport chain in the inner mitochondrial membrane.
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As these electrons are passed from one protein complex to another in the chain, energy is released.
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This energy is used to pump H+ ions (protons) from the mitochondrial matrix into the intermembrane space, creating an electrochemical gradient.
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The accumulation of H+ ions in the intermembrane space creates a high concentration of these ions outside the matrix, compared to a low concentration inside the matrix.
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These H+ ions then move down their electrochemical gradient, back into the matrix, through a protein complex called ATP synthase.
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The movement of H+ ions through ATP synthase releases energy.
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This energy is used to combine ADP (adenosine diphosphate) and a phosphate group to form ATP (adenosine triphosphate), the main energy currency of the cell.
So, the movement of H+ ions through ATP synthase down their electrochemical gradient releases energy that is used to synthesise ATP.
Similar Questions
A scientist conducts an experiment where they carefully inject lots of H+ ions into just the matrix of a mitochondrion. What effect would we expect for this to have on respiration and why?Group of answer choicesIncrease in ATP production due to more glycolysisDecrease in ATP production due to equalization of H+ gradientDecrease in ATP production due to less glycolysisThere would be no effect on respirationIncrease in ATP production due to equalization of H+ gradient
The part of cellular respiration where energy from proton (H+) gradient across the inner mitochondrial membrane is used to generate ATP like water flowing through a hydroelectric dam.Group of answer choicesglycolysiscitric acid cyclechemiosmosiselectron transport chainpyruvate oxidation
Which of the following statements about the electron transport chain and ATP production in the mitochondria is false?Group of answer choicesAny drug that inhibits the ATP synthase will also inhibit the flow of electrons in the ETC.For oxidative phosphorylation to occur, it is essential to have a membrane that is impermeable to protons except through specific proteins pores or protein complexesThe yield of ATP per mole of fuel depends on the type of molecule being catabolized.Some complexes of the respiratory chain pump protons into the matrix to create an electrochemical gradient.Exergonic electron transfer provides the energy for proton pumping.
Which of the following parts of the cell is known to perform the majority of cellular respiration, or the formation of ATP?Group of answer choicesGolgi Apparatusmitochondriaplasma membranevacuole
During aerobic cellular respiration, most of the energy that allows a cell to produce ATP is derived from which specific process?Multiple choice question.Electrons passing between carrier proteins of the electron transport chainThe biochemical reactions of glycolysisThe biochemical reactions of the citric acid cycleSplitting oxygen atoms to produce high-energy electrons
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