BIOLOGY
5th Edition
ISBN: 9781265202859
Author: BROOKER
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Chapter 7, Problem 9TY
Summary Introduction
Introduction: Oxidative phosphorylation is the process by which electrons are transferred from NADH or FADH2 to oxygen molecules. This happens through a series of steps in which it passes though many electron carriers and results in the formation of ATP molecules.
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Which of the following statements concerning ATP synthesis in mitochondria is FALSE?
a. interruption of the flow of electrons from NADH to oxygen would decrease ATP synthesis
b. making the inner mitochondrial membrane permeable to H+ would decrease ATP synthesis
c. the energy liberated by the electron-transport chain is used to pump H+ ions into the IM-space
d. the movement of H+ through a special channel enzyme (synthase) results in ATP synthesis
e. when protons move from the matrix to the IM-space, ATP is made from ADP + Pi
Under normal conditions, as electrons flow down the electron transport chain of the mitochondria:
a.
All of them are correct
b.
NADH and FADH2 are oxidized
c.
The pH of the matrix increases
d.
An electrochemical gradient is formed
e.
The electrons lose free energy
Which of the following statements about FAD is FALSE?
a.
More ATP is produced from the high-energy electrons carried by FADH2 than from those of NADH
b.
Electrons stored in FADH2 are used in oxidative phosphorylation
c.
FADH2 has more chemical potential energy than FAD
d.
FADH2 enters the electron transport chain at Complex 2
e.
FAD is reduced into FADH2 during the Citric Acid Cycle
Chapter 7 Solutions
BIOLOGY
Ch. 7.2 - Core Skill: Connections Look ahead to Table 45.1....Ch. 7.2 - Which organic molecules donate a phosphate group...Ch. 7.2 - Prob. 2CSCh. 7.4 - Prob. 1CCCh. 7.5 - Explain the meaning of the name cytochrome...Ch. 7.6 - Prob. 1CCCh. 7.6 - Prob. 1CSCh. 7.6 - Prob. 1EQCh. 7.6 - CoreSKILL In the experiment of Figure 7.13, what...Ch. 7.6 - Prob. 3EQ
Ch. 7.7 - Prob. 1CCCh. 7 - Which of the following pathways occurs in the...Ch. 7 - Prob. 2TYCh. 7 - Prob. 3TYCh. 7 - Which organic molecule supplies a two-carbon group...Ch. 7 - The ability to diagnose tumors using...Ch. 7 - Prob. 6TYCh. 7 - Certain drugs, which are called ionophores, cause...Ch. 7 - Prob. 8TYCh. 7 - Prob. 9TYCh. 7 - Prob. 10TYCh. 7 - Prob. 1CQCh. 7 - What causes the rotation of the subunit of ATP...Ch. 7 - Core Concept: Energy and Matter How is glucose...Ch. 7 - Discuss the advantages and disadvantages of...Ch. 7 - Prob. 2COQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which 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.arrow_forwardOxidative phosphorylation requires all of the items listed below except... A. a terminal electron acceptor which is O2 in mitochondria. B. a matrix more positively charged than the inter membrane space. C. the flow of electrons from NADH and QH2 in the membrane. D. enzyme complexes embedded in a membrane. E. ATP synthase in the correct position in the membrane.arrow_forwardwhich of the following woudl decrease the number of atp molecules generated per nadh molecule in the electron transport chain? a. increasing the energy of the electrons nadh transfer to complex I b. reducing the number of protons required by ATP synthase to produce an ATP moelcule c. having nadh transfer its elections to complex III instead of complex I d. increasing the amount of oxygen available to the cellarrow_forward
- Which of the following statements about aerobic respiration is true? a. Oxygen is the final electron acceptor in the citric acid cycle. b. Coenzyme-A is a substrate in the reaction that generates a key reactant for the citric acid cycle. c. Redox reactions occur in the electron transport chain (ETC), but not during the citric acid cycle and not during glycolysis. d. The citric acid cycle is the main ATP producer in aerobic respiration.arrow_forwardWhich 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.arrow_forwardWhich of the following statements about the TCA cycle is INCORRECT? a. All reactions of the TCA cycle take place in the cytosol. b. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH2. c. The TCA cycle can recover much more energy than homolactic fermentation. d. Under aerobic conditions the TCA cycle is used to oxidize pyruvate. e. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.arrow_forward
- Given that malonate inhibits succinate dehydrogenase which of the following statements is TRUE? a. FADH2 results in only 4 H+ being pumped out of the mitochondrial matrix. b. All electron transport is inhibited. c. Transfer of electrons from NADH to Coenzyme Q (ubiquinone) is inhibited. d. Transfer of electrons from FADH2 to Coenzyme Q (ubiquinone) is inhibited. e. NADH results in only 4 H+ being pumped out of the mitochondrial matrix. Clear my choicearrow_forwardPut the following pathways in the order they occurduring aerobic respiration.a. electron transfer phosphorylationb. acetyl–CoA formationc. citric acid cycled. glycolysisarrow_forwardWhich of the following statements concerning ATP synthesis is NOT true? a. The open conformation of the ATP synthase is for releasing ATP. b. The gamma subunit in the stalk responds to the flow of H+ and rotates the assembly counterclockwise and thus change the conformations of the active site to synthesize ATP. c. The tight conformation of the ATP synthase is for converting ADP and phosphate to ATP. d. The loose conformation of the ATP synthase is for binding ADP and phosphate. e. Ten protons are required to catalyze the rotation of the subunits so that one ATP is synthesized. Clear my choicearrow_forward
- Which of the following statements about the TCA cycle is INCORRECT? O a. The TCA cycle can recover much more energy than homolactic fermentation. b. All reactions of the TCA cycle take place in the mitochondria. C. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH₂. O d. Under anaerobic conditions the TCA cycle is used to oxidize pyruvate. Oe. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.arrow_forwardWhich of the following statements is true? A. The NADH dehydrogenase complex can pump more protons than can the cytochrome b-c1 complex. B. The pH in the mitochondrial matrix is higher than the pH in the intermembrane space. C. The proton concentration gradient and the membrane potential across the inner mitochondrial membrane tend to work against each other in driving protons from the intermembrane space into the matrix. D. The difference in proton concentration across the inner mitochondrial membrane has a much larger effect than the membrane potential on the total proton-motive force.arrow_forwardCompare ATP production in the citric acid cycle to the electron transport chain, or aerobic respiration. A. Both processes use oxidative phosphorylation. B. Both processes use substrate-level phosphorylation. C. The citric acid cycle uses substrate-level phosphorylation, and the electron transport chain uses oxidative phosphorylation. D. The citric acid cycle uses oxidative phosphorylation, and the electron transport chain uses substrate-level phosphorylation.arrow_forward
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