When an inhibitor blocks a step in electron transport, all of the following are true except that Oa. carriers preceding the inhibitor are in their oxidized form Ob. the cell will die Oc. carriers preceding the inhibitor are in their reduced form Od. ATP synthesis stops
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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. photosynthesisYou are trying to figure out an electron transport pathway including the following electron transport molecules: B, K, T, Q and X. You do so by employing inhibitors for various steps in the process. When you do, you get the following results: Inhibitor Electron Transport Molecules Trapped in Reduced Form Ticin Q & K Digitin K Estin T, K, Q & B Lucin Q, K & T What is the order of the molecules (the pathway) in the electron transport chain suggested by the above data from the most reduced to the least reduced molecule? only one answer options: K —> T —> B —> Q —> X K —> Q —> T —> B —> X T —> B —> K —> Q —> X X —> B —> T —> Q —> K
- Chemiosmosis is described as an energy coupling mechanism that Select one: O A. uses the stored energy of the proton gradient to synthesize ATP O B. builds up membrane potential across membrane O C. inhibits electron transfer along the electron transport chain. O D. phosphorylates substrate molecules. O E. lowers pH in the intermembrane space.Place a picture of an electron transport chain and mark the following using the appropriate letter: a. the acidic side of the membraneb. the side with a positive electrical chargec. potential energyd. kinetic energyWhich of the following regarding the ATP Synthase is INCORRECT? Protons flow through the a and c subunits The translocation of four protons through the ATP synthase fuels the synthesis of one ATP molecule The F1 domain can function as an ATPase The y subunit rotates while the xß dimers are stationary
- Which of the following regarding the Electron Transport Chain is INCORRECT? It can accept electrons from the Glycerol 3-Phosphate Shuttle It sets up the proton motive force Free energy from the exergonic electron flow is coupled to the endergonic transport of protons out of the matrix Electrons flow through electron acceptors/donors from a high reduction potential to a lower reduction potentialWhich of the following statements about oxidative phosphorylation is correct? O H+ ions are transferred from Complex I or Complex II to ATP synthase where ATP production occ O Proton pumps transfer electrons from the cytosol to the mitochondrial matrix as electrons are tra O The chemical and electrical gradient is established between the intermembrane space and the ma electron carriers. O ATP synthase pumps electrons back to the intermembrane space as a consequence of electrocher mitochondrial matrix. • PreviousThe proton motive force is the result ofa. ATP synthase transporting protons during ATP synthesisb. an electron gradient between the matrix and the intermembranespace of a mitochondrionc. a proton gradient between the matrix and intermembrane space ofa mitochondriond. a buildup of negatively charged ions
- without oxygen US V 11 glucose G 2 13 14 pyruvate with oxygen acetyl Col CO₂ CO₂ Using the diagram above, fill in the chart below for a summary of cellular respiration taking place in the mitochondria. X₂ X² но B I 2 4 electron transport system C > X Q 흐트 E Summary of Cellular Respiration Name of Location Brief Is ATP process of process Description produced? I E DDuring cellular respiration, which of the following diffuses through ATP synthase? O Phosphates O Protons (H* ions) O ATP O Electrons O Carbon dioxide (CO2)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 ___________into the intermembrane space (also called outer compartment). When these move back into the ___________, 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. protons (H+ ions); mitochondrial matrix protons; intermembrane space electrons; intermembrance space electrons; mitochondrial matrix