Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 7, Problem 7U
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 mitochondrion.
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Which of the following on the transport processes across the inner mitochondria membrane is FALSE?
a. The functions of the inner mitochondria membrane shuttle proteins do not cost energy.
b. The import of ADP into the mitochondria is always coupled to the export of ATP.
c. In heart and liver, NADH transport to the mitochondria requires the TCA cycle enzyme malate dehydrogenase.
d. In muscle, the glycerol 3-phosphate shuttle transports cytoplasmic NADH to the mitochondria as FADH .
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
Biology
Ch. 7.1 - Prob. 1LOCh. 7.1 - Explain the role of electron carriers in energy...Ch. 7.1 - Prob. 3LOCh. 7.2 - Prob. 1LOCh. 7.2 - Calculate the energy yield from glycolysis.Ch. 7.2 - Distinguish between aerobic respiration and...Ch. 7.3 - Prob. 1LOCh. 7.4 - Relate the nine reactions of the citric acid cycle...Ch. 7.4 - Diagram the oxidation reactions in the citric acid...Ch. 7.5 - Prob. 1LO
Ch. 7.5 - Prob. 2LOCh. 7.6 - Calculate the number of ATP molecules produced by...Ch. 7.7 - Prob. 1LOCh. 7.8 - Prob. 1LOCh. 7.8 - Distinguish between fermentation and anaerobic...Ch. 7.9 - Identify the entry points for proteins and fats in...Ch. 7.9 - Prob. 2LOCh. 7.10 - Prob. 1LOCh. 7 - Prob. 1DACh. 7 - Prob. 1UCh. 7 - Prob. 2UCh. 7 - Which of the following is NOT a product of...Ch. 7 - Glycolysis produces ATP by a. phosphorylating...Ch. 7 - What is the role of NAD+ in the process of...Ch. 7 - Prob. 6UCh. 7 - The electrons carried by NADH and FADH2 can be a....Ch. 7 - Prob. 1ACh. 7 - Prob. 2ACh. 7 - Prob. 3ACh. 7 - What is the importance of fermentation to cellular...Ch. 7 - Prob. 5ACh. 7 - A chemical agent that makes holes in the inner...Ch. 7 - Prob. 7ACh. 7 - Use the following table to outline the...Ch. 7 - Human babies and hibernating or cold-adapted...Ch. 7 - Recent data indicate a link between colder...
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- The molecule Q moves through the non-polar portion of the inner membrane of mitochondria. Based solely on this observation which of the following would apply? a. It is associated with motor proteins. b. None of the other answers are correct. c. It is a primarily polar molecule. d. It is a lipid insoluble molecule.arrow_forwardThe function of cristae in a mitochondrion is A. electron transport and ATP synthesis B. carbon assimilation C. intake of o2 D. elimination of Co2arrow_forwardThe figure here shows oxygen concentration in a suspension of isolated mitochondria. Immediately after the addition of uncoupler, oxygen levels decline more rapidly than before. But soon afterwards the rate levels off. What is the likely reason for this levelling off? uncoupler Oxygen (umol) Levelling off Time (min) A. Lack of ATP B. Decrease in the rate of glycolysis. C. Decrease in the levels of uncoupler. D. Lack of NADHarrow_forward
- 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 + Piarrow_forwardWhich of the following statements concerning the location of the metabolic pathways is correct? a. All reactions of the glycolysis take place in the mitochondria. b. All reactions of the TCA cycle take place in the mitochondria. c. Some reactions of the TCA cycle take place in the cytosol, and some in mitochondria. d. Some reactions of the glycolysis take place in the cytosol, and some in mitochondria.arrow_forwardATP synthase enzymes are located in thea. cytosol.b. inner mitochondrial membrane.c. intermembrane space.d. mitochondrial matrix.arrow_forward
- Which of the following is produced in the intermembranespace of mitochondria?a. ATPb. a high concentration of H+c. NADH and FADH2d. acetyl CoAarrow_forwardCyanide inhibits an enzymatic complex located in the: a. Nucleus b. Inner mitochondiral membrane c. Outer mitochondrial membrane d. Cytosolarrow_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
- choose the description below that best completes the statement " oxidative phosphorylation is the process in mitochondria by which a. electrons reduce O2 to H2O and this causes ATP to mbe made b.glycolysis produces more ATP than is needed to activate its pathway. c. oxygen is used to cause phosphorylation of biological molecules. d. synthesis of ATP is dependent on passage of electrons through the electron transport chainarrow_forwardThe Krebs cycle occurs in the Select one: a. cytoplasm, as the compound acetyl CoA enters. b. mitochondria, as the compound pyruvate (C3) enters. c. mitochondria, as the compound acetyl CoA enters. d. cytoplasm, as the compound pyruvate (C3) enters.arrow_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_forward
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