ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 3TYU
In mitochondria, exergonic
- A. are the source of energy driving prokaryotic ATP synthesis.
- B. provide the energy that establishes the proton gradient.
- C. reduce carbon atoms to carbon dioxide.
- D. are coupled via phosphorylated intermediates to endergonic processes.
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Which of the following statements about cellular respiration is TRUE in eukaryotes?
A. For every molecule of NADH oxidized in the electron transport chain, 1 molecule of ATP is produced.
B. ATP synthase harnesses the flow of protons (hydrogen ions = H+) from the mitochondrial matrix to the intermembrane space to produce ATP.
C. ATP synthase transduces the flow of protons (hydrogen ions = H+) from the intermembrane space to the mitochondrial matrix into kinetic (mechanical) energy
D. H2O is the final electron acceptor in the electron transport chain, being oxidized to O2 and H+.
E. All of the above are true
Which of the following statements describes the end step for the electron transport chain?
A. H+ ions flow down the gradient to generate ATP
B. electrons are transferred to NADH and FADH2 for chemiosmosis
C. electrons are transferred to oxygen, causing it to split and take up H+ ions, which form water
D. H+ are pumped across the inner membrane of mitochondria to establish an electrochemical gradient
Which 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.
Chapter 7 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 7.1 - Compare and contrast aerobic and anaerobic...Ch. 7.1 - Name and describe the two ways in which ATP is...Ch. 7.1 - Prob. 3CCCh. 7.2 - During step 6 in Figure 7.9, which molecule acts...Ch. 7.3 - Name the molecules that conserve most of the...Ch. 7.3 - Prob. 2CCCh. 7.4 - Prob. 1CCCh. 7.4 - Prob. 2CCCh. 7.4 - MAKE CONNECTIONS Membranes must be fluid to...Ch. 7.5 - Prob. 1CC
Ch. 7.5 - WHAT IF? A glucose-fed yeast cell is moved from an...Ch. 7.6 - MAKE CONNECTIONS Compare the structure of a fat...Ch. 7.6 - Prob. 2CCCh. 7.6 - WHAT IF? During intense exercise, can a muscle...Ch. 7 - The immediate energy source that drives ATP...Ch. 7 - Which metabolic pathway is common to both...Ch. 7 - In mitochondria, exergonic redox reactions A. are...Ch. 7 - The final electron acceptor of the electron...Ch. 7 - What is the oxidizing agent in the following...Ch. 7 - When electrons flow along the electron transport...Ch. 7 - Most co, from catabolism is released during A....Ch. 7 - DRAW IT The graph here shows the pH difference...Ch. 7 - INTERPRET THE DATA Phosphofructokinase is an...Ch. 7 - Prob. 10TYUCh. 7 - FOCUS ON EVOLUTION ATP synthases are found in the...Ch. 7 - Prob. 12TYUCh. 7 - Prob. 13TYU
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- During electron transport and ATP synthesis in eukaryotes, the H+ gradient accumalates in: a. The cytosol b. The mitochondrial matrix c. The mitochondiral intermembrane space d. Outside the mitochondriaarrow_forwardWhich of the following correctly describes where each process takes place in eukaryotic cells? a. conversion of pyruvate to acetyl CoA – mitochondrial matrix b. glycolysis – mitochondrial matrix c. ATP synthase – ATP synthesized in cytosol using proton motive force d. electron transport chain – electron carrier proteins embedded in outer mitochondrial membrane e. citric acid cycle – cytosolarrow_forwardWhen 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 ATParrow_forward
- Compare 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_forwardWhich 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 + Piarrow_forwardAll of the following occur in the cytoplasm except: a. glycolysis in the prokaryote b. glycolysis in the eukaryote c. pyruvate oxidation in the eukaryotearrow_forward
- The complete catabolism of one molecule of C6H12O6 into carbon dioxide and water produces a larger amount of ATP in aerobic prokaryotes than it does in aerobic eukaryotes because aerobic prokaryotes: A. always produce ethanol rather than lactic acid as a byproduct B. generate more molecules of NADH during aerobic respiration C. have no transport costs to get NADH into mitochondria D. generate more molecules of FADH2 during aerobic respiration E. are able to use pyruvate as a substrate for fermentationarrow_forwardUnder 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 energyarrow_forwardWhich 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_forward
- The electrons carried by NADH and FADH2 can be a. pumped into the intermembrane space. b. transferred to the ATP synthase. c. moved between proteins in the inner membrane of the mitochondrion. d. transported into the matrix of the mitochondrionarrow_forwardThe above product water molecules are generated in which eukaryotic cell compartment?A. the mitochondrial matrix (site of the Krebs cycle)B. the thylakoid membrane of chloroplasts (site of photosystems I and II)C. the chloroplast stroma (site of the Calvin cycle)D. the inner mitochondrial membrane (site of electron transport)E. the cytoplasm (site of glycolysis)arrow_forwardPlace the following steps of cellular respiration in the correct order by numbering them from 1 to 4. a. The Krebs cycle produces the energy carriers NADH, FADH2, and ATP. b. If oxygen levels are adequate, pyruvate is transported into the mitochondrion. If oxygen levels are very low, fermentation proceeds. c. Glucose is broken down to produce ATP and NADH. d. An electron transport chain produces ATP from ADP.arrow_forward
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