Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433776
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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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 takes place during oxidative phosphorylation in mitochondria?
a. protons are pumped from the matrix to the intermembrane space
b. protons are pumped from the intermembrane space to the matrix
c. electrons are pumped from the matrix to the intermembrane space
d. electrons are pumped from the intermembrane space to the matrix
e. NADH is pumped from the matrix to the intermembrane space
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
Chapter 7 Solutions
Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology in Focus (2nd Edition)
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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- 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.arrow_forwardIn mitochondria, the electron transport chain converts energy stored in NADH and FADH2 into a: a. Gradient of electrons between the matrix and the intermembrane space b. Gradient of protons between the matrix and the intermembrane space c. Flux of ATP between the cytoplasm and the matrix d. Gradient of neutrons between the matrix and the cytoplasm e. Flux of ADP through substrate cycling The theoretical ATP yield from the complete oxidation of 1 mole of glucose via glycolysis, the TCA cycle and the electron transport chain is higher in a heart cell compared to a skeletal muscle cell because: a. O2 availability is different in the different cell types b. Heart cells are more metabolically active c. The TCA cycle generates more NADH in a heart cell d. Skeletal muscle cells are less energy dense e. Different mitochondrial shuttles operating in the two tissuesarrow_forwardDuring 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_forward
- Which 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_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_forward
- What is the effect of increased levels of hydrogen ions in the intermembrane space of the mitochondria? answer choices A.) Decreased levels of oxidative phosphorylation B.) Increased levels of water in intermembrane space C.) Decreased levels of chemiosmosis D.) Increased ATP productionarrow_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_forwardThe 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_forward
- Consider the following diagram when answering the questions about cellular respiration. (a) Label the diagram. (b) Considering the electron transport chain. Why type of cell transport is happening at the ETC? Explain. (c) What type of cell transport is happening at ATP synthase? Explain. B Darrow_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_forwardConsider the following diagram when answering the questions about cellular respiration. (a) Label the diagram. (b) Considering the electron transport chain. Why type of cell transport is happening at the ETC? Explain. (c) What type of cell transport is happening at ATP synthase? Explain. B A D Earrow_forward
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