The combined processes of electron and H+ transport and subsequent ATP synthesis
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CHOOSE THE CORRECT LETTER
- The combined processes of electron and H+ transport and subsequent ATP synthesis is called which of the following?
A. oxidative phosphorylation
B. photophosphorylation
C. substrate level phosphorylation
D. cellular phosphorylation
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- Figure 4.15 Cyanide inhibits cytochrome c oxidase, a component of the electron transport chain. If cyanide poisoning occurs, would you expect the pH of the intermembrane space to increase or decrease? What affect would cyanide have on ATP synthesis? Figure 4.15 (a) The electron transport chain is a set of molecules that supports a series of oxidation-reduction reactions. (b) ATP synthase is a complex, molecular machine that uses an H+ gradient to regenerate ATP from ADP. (c) Chemiosmosis relies on the potential energy provided by the H+ gradient across the membrane.Which of the following pathways requires molecular oxygen (O2)? a. aerobic respiration b. lactate formation c. alcoholic fermentation d. photosynthesisWhich of the following statements is TRUE of the electron transport chain (ETC)? A. The movement of electrons down the ETC drives the formation of a proton (H+) gradient. B. The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC. C. The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase. D. The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.
- Which electron carrier would have the greatest negative impact on ATP production during oxidative phosphorylation if its production was inhibited? answer choices A.) Water B.) FADH2 C.) Oxygen D.) NADHThermogenin in the inner membrane of brown fat cell mitochondria does all of the following except A) decrease the proton gradient. B) uncouple ATP synthesis from electron transport. C) generate heat. D) decrease ATP synthesis. E) increase ATP synthesisChoose the best answer for following question. Which of these is not true of the electron transport chain?a. The electron transport chain is located on the cristae of themitochindria.b. The electron transport chain produces more NADH than anymetabolic pathway.c. The electron transport chain contains cytochrome molecules.d. The electron transport chain ends when oxygen acceptselectrons.
- When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs? Group of answer choices A. ATP synthase pumps protons by active transport B. The pH of the matrix increases C. The electrons gain free energy D. The cytochromes phosphorylate ADP to form ATPWhich of the following processes is mediated by the F0F1 ATP Synthase complex? a NADH oxidation b Osmosis c Substrate level phosphorylation d Conversion of potential energy to mechanical energy to chemical energyWhich of the following statements about the generation of ATP in the electron transport chain is correct? a. The generation of ATP from ADP coupled to electron transfer occurs by substrate level phosphorylation as in glycolysis. b. ATP synthase generation of ATP involves a rotating structure inside the inner mitochondrial membrane. c. ATP synthase generation of ATP involves a rotating structure outside the inner mitochondrial membrane. d. Electron transport generates a proton gradient across the outer mitochondrial membrane.
- The direct formation of ATP by the transfer of a phosphate group from a donor molecule to ADP is called ________. a. substrate-level phosphorylation b. oxidative phosphorylation c. cyclic photophosphorylation d. noncyclic photophosphorylation e. indigenous phosphorylationWhich of the following statements is most correct? The electron transport chain - A: generates a pH gradient that reduces O2 to H2O B: generates a proton gradient across the outer mito membrane C: generates a proton gradient across the inner mito membrane D: uses the energy stored in high energy electron carriers to synthesize ATP E: establishes a membrane potential across the outer mito membraneWhich of these is not true of the electron transport chain?a. The electron transport chain is located on the cristae of themitochindria.b. The electron transport chain produces more NADH than anymetabolic pathway.c. The electron transport chain contains cytochrome molecules.d. The electron transport chain ends when oxygen acceptselectrons.
