BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 7, Problem 7A
Summary Introduction
Saccharomyces cerevisiae, commonly known as yeast, is a eukaryotic organism that belongs to kingdom
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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.
Which 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.
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 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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- Which of the following distinguishes lactate fermentation from alcoholic fermentation? (Only one answer is correct) A. CO2 is not produced during lactate fermentation. B. Pyruvate is an input to regenerate NAD+ during lactate fermentation. C. Two ATP are used to initiate glycolysis during lactate fermentation. D. Four ATP are produced by glycolysis during lactate fermentation.arrow_forwardWhich of the following number of products from the Krebs Cycle is a manifestation of 4 pyruvate molecules generated from glycolysis? A. 2 ATP, 6 NADH, 2 FADH₂ B. 3 ATP, 9 NADH, 3 FADH₂ C. 4 ATP, 4 NADH, 4 FADH₂ D. 4 ATP, 12 NADH, 4 FADH₂arrow_forwardRapidly dividing cells such as bone marrow, skin, intestinal mucosa, and cancer cells need DNA synthesis. In these cells, the following is observed: a. a decreased NADPH / NADP+ ratio b. increased flux through the oxidative reactions c. Flux through the oxidative reactions is low and the nonoxidative reactions are reversed to make ribose 5-phosphate. d. Ribose 5-phosphate is recycled through the oxidative steps via the nonoxidative reactions and gluconeogenesis. e. Ribose 5-phosphate is shunted into glycolysis by the nonoxidative reactions.arrow_forward
- Anaerobic Glycolysis (of 1 mole glucose) that ends with lactate fermentation provides the cell with: a. 1 mole of NAD+, which is a necessary substrate for performing glycolysis once more b. 1 mole of NADH, in from the investment stage of glycolysis c. 2 moles of ATP and 2 moles of lactate d. All of these answers are truearrow_forwardWhich 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_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
- With regards to glycolysis, all of the following statements are FALSE except . a. glycolysis does not require oxygen o b. 4 net ATP are formed O c. 2 ATP gre formed in the energy payoff phase d. 1 ATP are used in the energy payoff phase e. glycolysis occurs in the mitochondriaarrow_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_forwardWhich of the following statements about FAD is FALSE? a. More ATP is produced from the high-energy electrons carried by FADH2 than from those of NADH b. Electrons stored in FADH2 are used in oxidative phosphorylation c. FADH2 has more chemical potential energy than FAD d. FADH2 enters the electron transport chain at Complex 2 e. FAD is reduced into FADH2 during the Citric Acid Cyclearrow_forward
- ATP production is limited from glycolysis in strenuously exercising muscle or when yeast are fermenting carbohydrates in closed vessels. The limiting factor is Select one: a. the increased acidity from lactic acid causing muscle damage b. the accumulation of CO, c. the lack of ATP to continue glycolysis d. the lack of organic fuel molecules to oxidize e. the need to regenerate NAD+arrow_forwardWhy cannot gluconeogenesis and glycolysis be active at the same time? a. False! Gluconeogenesis starts in mitochondria, glycolysis in cytoplasm, so they can be active at the same time! b. True! Gluconeogenesis and Glycolysis use the same reversible enzyme, so these enzymes cannot support both reactions. c. False! Gluconeogensis uses bypasses, so that's why both pathways can be active at the same time. d. True! Gluconeogensis makes glucose, glycolysis breaks glucose. The purpose of both enzymes is clearly opposed. e. False! Gluconeogenesis is in the liver, glycolysis is not - it's in the muscle, so a different organ.arrow_forwardDuring glycolysis there are two hexoses in the pathway. a. What are these two hexoses? b. What are the two phosphorylated products? What is the energy cost to phosphorylate them? C.arrow_forward
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