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Protons (H⁺ ions) are pumped across the inner mitochondrial membrane to create a proton gradient during cellular respiration. This gradient generates a difference in proton concentration and electrical charge, known as the proton motive force. As protons flow back into the mitochondrial matrix through ATP synthase, this energy is harnessed to synthesize ATP from ADP and inorganic phosphate.
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What ion is pumped across the inner membrane in the ETC?
Protons (H+ ions) are pumped across the inner mitochondrial membrane during electron transport in the electron transport chain (ETC). This creates a proton gradient that is used to generate ATP via ATP synthase.
Where is ATP made in the mitochondria?
ATP is made in the mitochondria through a process called oxidative phosphorylation, which occurs in the inner membrane of the mitochondria. The electron transport chain generates a proton gradient across the inner membrane, which drives the production of ATP by ATP synthase.
How does the cell use the charge differences that build up across the inner mitochondrial membrane during cellular respiration?
The charge differences across the inner mitochondrial membrane are used to generate ATP through a process called chemiosmosis. Protons are pumped across the membrane, creating a proton gradient. As protons flow back across the membrane through ATP synthase, ATP is produced. This process is essential for providing energy to the cell.
What would increase the electrochemical gradient across a membrane?
Hydrogen ions are pumped across the membrane by carrier proteins of the electron transport chain
Does the generation of proton gradients across membranes occur in both potosynthesis and respiration?
Yes, the generation of proton gradients across membranes occurs in both photosynthesis and respiration. In photosynthesis, protons are pumped across the thylakoid membrane during the light reactions. In respiration, protons are pumped across the inner mitochondrial membrane during the electron transport chain.
What ion is pumped across the inner membrane in the ETC?
Protons (H+ ions) are pumped across the inner mitochondrial membrane during electron transport in the electron transport chain (ETC). This creates a proton gradient that is used to generate ATP via ATP synthase.
Where is ATP made in the mitochondria?
ATP is made in the mitochondria through a process called oxidative phosphorylation, which occurs in the inner membrane of the mitochondria. The electron transport chain generates a proton gradient across the inner membrane, which drives the production of ATP by ATP synthase.
Which parts of the mitochondria are directly involved in the synthesis of ATP during chemiosmosis?
The inner mitochondrial membrane and the enzyme complex ATP synthase are directly involved in the synthesis of ATP during chemiosmosis. Protons are pumped across the inner mitochondrial membrane, creating a proton gradient that drives the production of ATP by ATP synthase through oxidative phosphorylation.
How does the cell use the charge differences that build up across the inner mitochondrial membrane during cellular respiration?
The charge differences across the inner mitochondrial membrane are used to generate ATP through a process called chemiosmosis. Protons are pumped across the membrane, creating a proton gradient. As protons flow back across the membrane through ATP synthase, ATP is produced. This process is essential for providing energy to the cell.
Which of the following best describes the direct mechanism of ATP production during photosynthesis?
The direct mechanism of ATP production during photosynthesis occurs through the process of photophosphorylation, specifically through the light-dependent reactions in the thylakoid membrane of the chloroplast. Here, ATP is produced through the generation and flow of protons across the membrane, driving the ATP synthase enzyme to produce ATP from ADP and inorganic phosphate.
What is the proxomite source of energy for oxidative phosphorylation?
The proximate source of energy for oxidative phosphorylation is the proton gradient across the inner mitochondrial membrane. This gradient is established during the electron transport chain as electrons are passed along and protons are pumped across the membrane. The flow of protons back into the matrix through ATP synthase drives the production of ATP.
When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space the result is?
Hydrogen ions are pumped through the membrane in the final stage of ATP generation in the electron transport chain. The ions pumped through the membrane create a gradient and cause the hydrogen to "want" to pass back through the membrane. They do so through the protein channels in the membrane and attaches a phosphate to adenosine diphosphate to make adenosine triphosphate.
What would increase the electrochemical gradient across a membrane?
Hydrogen ions are pumped across the membrane by carrier proteins of the electron transport chain
Why are protons (H) pumped across the inner mitochondrial membrane?
Protons (H) are pumped across the inner mitochondrial membrane to create a proton gradient, which is used to generate ATP through a process called oxidative phosphorylation. This ATP is the main source of energy for the cell.
Does the generation of proton gradients across membranes occur in both potosynthesis and respiration?
Yes, the generation of proton gradients across membranes occurs in both photosynthesis and respiration. In photosynthesis, protons are pumped across the thylakoid membrane during the light reactions. In respiration, protons are pumped across the inner mitochondrial membrane during the electron transport chain.
Synthesis of ATP by chemiosmotic mechanism occurs during?
Synthesis of ATP by chemiosmotic mechanism occurs during oxidative phosphorylation in the inner mitochondrial membrane. Protons are pumped across the membrane by the electron transport chain, creating a proton gradient. ATP synthase then uses this gradient to generate ATP from ADP and inorganic phosphate.
What are the events of chemiosmosis?
During chemiosmosis, protons are pumped across a membrane, creating a proton gradient. This gradient drives the flow of protons back across the membrane through ATP synthase, which couples this flow to the synthesis of ATP. This process occurs in both cellular respiration and photosynthesis to generate ATP for cellular energy.
