Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 9, Problem 14TYK
The citric acid cycle is best described as
- a. the principle site for ATP synthesis within the cell.
- b. the process by which CO2 is fixed into stable organic molecules in plants.
- c. the process in which oxygen is required during respiration.
- d. a process that stores chemical energy primarily in the form of intermediates such as FADH2 and NADH.
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Students have asked these similar questions
Which 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.
The metabolic function of the pentose phosphate pathway is to:
a. generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids.
b. provide intermediates for the citric acid cycle
c. participate in oxidation-reduction reactions during the formation of H,O
d. act as a source of ADP for biosynthesis
Which of the following statements is NOT true about Krebs Cycle?
a.
Krebs cycle is composed of 8-step enzymatic reactions.
b.
For every CO2 released in the cycle, NADH is produced.
c.
Succinyl-CoA allows the phosphorylation of GDP (Guanosine Diphosphate)
d.
The carbon atoms from the glucose that enters the cycle are released from the mitochondrion immediately.
Chapter 9 Solutions
Study Guide for Campbell Biology
Ch. 9 - Fill in the following summary equation for...Ch. 9 - Fill in the appropriate terms in the following...Ch. 9 - a. In the conversion of glucose and O2 to CO2 and...Ch. 9 - a. NAD+ is called a(n) ____________________. b....Ch. 9 - Fill in the three stages of cellular respiration...Ch. 9 - Fill in the blanks in the following summary...Ch. 9 - Fill in the blanks in the following diagram of the...Ch. 9 - Label the following diagram of oxidative...Ch. 9 - Fill in the following tally for the maximum ATP...Ch. 9 - How much more ATP can be generated by aerobic...
Ch. 9 - This chapter describes how catabolic pathways...Ch. 9 - Prob. 2SYKCh. 9 - Fill in the following table to summarize...Ch. 9 - When electrons move closer to a more...Ch. 9 - In the reaction C6H12O6 + 6 O2 6 CO2 + 6 H2O, a....Ch. 9 - In which of the following conversions is the first...Ch. 9 - Some prokaryotes use anaerobic respiration, a...Ch. 9 - Which of the following reactions is incorrectly...Ch. 9 - In which organelle of a plant cell does the citric...Ch. 9 - Which of the following compounds produces the most...Ch. 9 - Aerobic eukaryotes produce CO2 as a by-product...Ch. 9 - Which of the following statements correctly...Ch. 9 - In the electron transport system, H+ ions are...Ch. 9 - When glucose is oxidized to CO2 and water,...Ch. 9 - The energy required for the chemiosmotic synthesis...Ch. 9 - Which of the following statements correctly...Ch. 9 - The citric acid cycle is best described as a. the...Ch. 9 - Fermentation produces less ATP than cellular...Ch. 9 - If muscle cells do not receive enough oxygen from...Ch. 9 - Glucose made from six radioactively labeled carbon...Ch. 9 - Glycolysis is considered one of the first...Ch. 9 - Which of the following substances produces the...Ch. 9 - Fats and proteins can be used as fuel in the cell...Ch. 9 - Which of the following statements is false...Ch. 9 - Brown fat, which is found in newborn infants and...
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- Which of the following is incorrect about the fifth step (conversion of succinyl-CoA, GDP, and Pi to succinate and GTP) of the citric acid cycle? a. GTP is made because succinyl-CoA is a thioester b. It is not regulated c. It involves a "substrate level" phosphorylation of GDP d. It is irreversiblearrow_forwardThe oxidation state of critical cofactors plays an important role in regulating cell metabolism. Which of the following correctly describes the relationship between oxidation states and a cellular process? A. An increased NAD+/NADH ratio will drive fatty-acid synthesis. B. An increased FADH2/FAD ratio will drive ATP production. C. A decreased FADH2/FAD ratio will increase the activity of ATP synthase. D. A decreased NADH/NAD+ ratio will drive fatty-acid oxidation. answer choice is D, can anyone explain to me why through catabolism and anabolism and energy I have not gone through glycolysis or krebs cycle, synthesis or oxidation yet so if someome could explain it in laymens terms that would be greatarrow_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
- Which of the following is NOT TRUE about fatty acid biosynthesis? A. 8 NADPH is used to produce palmitate. B. The growing fatty acid chain is elongated by the sequential addition of two-carbon units. C. The process is repeated 7 times to produce palmitate. D. The process occurs in the cytosol.arrow_forwardPhosphofructokinase is an important control enzyme in the regulation of cellular respiration. Which of the following statements correctly describes phosphofructokinase activity? a. It is inhibited by citrate, an intermediate of the citric acid cycle. b. It catalyzes a reaction which increases the rate of the overall pathway. c. It catalyzes an early step of glycolysis which has the lowest level of activation energy among the overall pathway. d. It is activated by ATP. e. It is inhibited by AMP.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
- 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 about the citric acid cycle a. The Citric Acid Cycle is an 8-step cycle that produces the most electron carrier molecules throughout the process of cellular respiration. b. In Citric Acid Cycle, both the acetyl group and coenzyme A of Acetyl CoA are combined to oxaloacetate. c. In Citric Acid Cycle, glucose is only partially broken down and there are still remnants of glucose after this process. d. The ATP produced during this process is via oxidative phosphorylationarrow_forwardIn the first step of glycolysis, glucose can be phosphorylated to glucose-6-phosphate, because.. A. transfer of a phosphate from ATP to glucose is endergonic. B. a phosphoanhydride bond has higher energy of hydrolysis than is required for formation of a phosphoester bond. C. the reaction does not require an enzyme. D. the reaction is highly reversible. E. All of the above are correct.arrow_forward
- Which of these statements about ATP is true?a.The bond joining ADP and the third phosphate is a high-energy bond.b.The formation of ATP is coupled to energy-liberating reactions.c.The conversion of ATP to ADP and Pi provides energy for biosynthesis, cell movement, and other cellular processes that require energy.d.ATP is the “universal energy carrier” of cells.e. .All of these are true.arrow_forwardIn the citric acid cycle what is the general types of reaction in which a. Fumarate is involved as a reactant b. Malate is involved as a product c. Isocitrate is involved as a reactant d. Oxaloacetate is involved as a productarrow_forwardWhich of the following citric acid cycle intermediates is decarboxylated during the operation of the cycle? A. More than one correct response B. No correct response C. Isocitrate D. Succinate E. Oxaloacetatearrow_forward
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