Human Anatomy & Physiology (2nd Edition)
2nd Edition
ISBN: 9780134553511
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 7CYR
Which of the following statements is false?
a. Oxaloacetate is regenerated at the completion of the citric acid cycle.
b. Glycolysis takes place in the cytosol.
c. The energy yield from oxidative phosphorylation is much greater than the yield from substrate-level phosphorylation.
d. The electromotive force directly generates ATP.
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Phosphofructokinase 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.
Which 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 phosphorylation
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.
Chapter 23 Solutions
Human Anatomy & Physiology (2nd Edition)
Ch. 23.1 - 1. How do catabolism and anabolism differ?
Ch. 23.1 - Prob. 2QCCh. 23.1 - 3. How do endergonic and exergonic reactions...Ch. 23.1 - Why are endergonic and exergonic reactions...Ch. 23.1 - Prob. 5QCCh. 23.1 - How does ATP fuel cellular processes?Ch. 23.1 - 7. In an oxidation-reduction reaction, what...Ch. 23.1 - 8. What is electron affinity? Do electrons flow...Ch. 23.1 - What is the electromotive force?Ch. 23.2 - How do substrate-level phosphorylation and...
Ch. 23.2 - What is glycolytic catabolism? Why is it also...Ch. 23.2 - Prob. 3QCCh. 23.2 - Prob. 4QCCh. 23.2 - Prob. 5QCCh. 23.2 - 6. Why is it important to regenerate NAD+ under...Ch. 23.2 - 7. What products are generated by the citric acid...Ch. 23.2 - Prob. 8QCCh. 23.2 - What is the potential energy in the bonds of...Ch. 23.3 - Prob. 1QCCh. 23.3 - Prob. 2QCCh. 23.3 - Prob. 3QCCh. 23.3 - Prob. 4QCCh. 23.3 - Why must the body eliminate the ammonia that...Ch. 23.4 - 1. How is glucose stored in the body?
Ch. 23.4 - Prob. 2QCCh. 23.4 - Prob. 3QCCh. 23.4 - Prob. 4QCCh. 23.4 - How are nonlipids converted into fats?Ch. 23.4 - Prob. 6QCCh. 23.4 - Prob. 7QCCh. 23.5 - 1. Why does anabolism dominate in the absorptive...Ch. 23.5 - Prob. 2QCCh. 23.5 - Prob. 3QCCh. 23.5 - Prob. 4QCCh. 23.5 - Prob. 5QCCh. 23.5 - 6. How do the actions of leptin differ from those...Ch. 23.6 - Prob. 1QCCh. 23.6 - Prob. 2QCCh. 23.6 - Prob. 3QCCh. 23.6 - Prob. 4QCCh. 23.6 - Prob. 5QCCh. 23.6 - Prob. 6QCCh. 23.6 - Prob. 7QCCh. 23.6 - Prob. 8QCCh. 23.7 - Prob. 1QCCh. 23.7 - Prob. 2QCCh. 23.7 - Prob. 3QCCh. 23.7 - Prob. 4QCCh. 23.7 - Prob. 5QCCh. 23.7 - Prob. 6QCCh. 23.7 - Prob. 7QCCh. 23.7 - Why is HDL considered good cholesterol, whereas...Ch. 23.7 - Prob. 9QCCh. 23.7 - Prob. 10QCCh. 23.7 - Prob. 11QCCh. 23 - Which of the following statements is false? a....Ch. 23 - Prob. 2CYRCh. 23 - Fill in the blanks: A/an ________reaction releases...Ch. 23 - Mark the following statements as true or false. If...Ch. 23 - Prob. 5CYRCh. 23 - Place the following events of glucose catabolism...Ch. 23 - Which of the following statements is false? a....Ch. 23 - Prob. 8CYRCh. 23 - Prob. 9CYRCh. 23 - Prob. 10CYRCh. 23 - Prob. 11CYRCh. 23 - Prob. 12CYRCh. 23 - Prob. 13CYRCh. 23 - Prob. 14CYRCh. 23 - Prob. 15CYRCh. 23 - Prob. 16CYRCh. 23 - Prob. 17CYRCh. 23 - Prob. 18CYRCh. 23 - Prob. 19CYRCh. 23 - 20. Which of the following statements is false?
a....Ch. 23 - Prob. 21CYRCh. 23 - Prob. 22CYRCh. 23 - Prob. 1CYUCh. 23 - Prob. 2CYUCh. 23 - Prob. 3CYUCh. 23 - Prob. 4CYUCh. 23 - People with extremely restricted caloric intake...Ch. 23 - Prob. 1AYKACh. 23 - Prob. 2AYKACh. 23 - 3. Certain dietary supplements for weight loss...Ch. 23 - Prob. 4AYKBCh. 23 - Prob. 5AYKB
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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 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_forwardDuring cellular respiration, 60 molecules of CO2 were given off as waste. a. How many pyruvate molecules were produced in glycolysis? b. The total amount of ATP produced by complete cellular respiration would be? c. The amount of energy available (Net ATP) to cell as ATP would be?arrow_forwardWhich 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.arrow_forward
- Which 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_forwardIn the first stage of glycolysis, the hydroxyl group on C6 of glucose is phosphorylated to form glucose-6-phosphate (G6P). In this reaction, which of the following statements is true? a. O b. d. e. Glucose kinase is used to catalyze the reaction. Hexokinase is used to catalyze the reaction. A molecule of NADH is synthesized. One ATP is synthesized. Fructose kinase is used to catalyze the reaction.arrow_forwardWhich 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_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 correct? a. Glycolysis and Krebs cycle produce ATP in substrate level phosphorylation b. Glycolysis and Krebs cycle produce ATP in oxidative level phosphorylation. c. Glycolysis and pyruvate oxidation produce ATP in substrate level phosphorylation. d. Glycolysis and pyruvate oxidation produce ATP in oxidative level phosphorylation.arrow_forwardWhich of these is not true of the citric acid cycle?a. The citric acid cycle includes the prep reaction.b. The citric acid cycle produces ATP by substrate-level ATPsynthesis.c. The citric acid cycle occurs in the mitochondria.d. The citric acid cycle produces two ATP per glucose molecule.arrow_forward
- A key enzyme of the Citric Acid Cycle is isocitrate dehydrogenase. It catalyzes the conversion of isocitrate to alpha ketoglutarate. Given your understanding of the Citric Acid Cycle, how is the activity of isocitrate dehydrogenase likely regulated? A. It is activated when fermentation starts. B. It is activated when the levels of NADH are low relative to NAD+. C. It is activated when levels of ATP are high relative to ADP. D. It is inhibited by high levels of pyruvate.arrow_forwardDuring which of the following conversions in Glycolysis is ATP generated? (more than one answer) a. 1,3-bisphophoglycerate to 3-phosphoglycerate b. Phosphoenolpyruvate to Pyruvate c. Fructose 6-Phosphate to Fructose 1,6-bisphosphate d. Glucose to Glucose 6-phosphatearrow_forwardIf the enzyme that catalyzed the reaction that converts pyruvate to acetyl-CoA and carbon dioxide is inhibited: a. the production of ATP would decreases but the production of electron carriers would be unaffected b. the concentration of pyruvate would decrease c. the citric acid cycle will not be affected d. ATP production in the electron transport chain/oxidative phosphorylation will increase e. the concentration of acetyl Co A would decreasearrow_forward
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