Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 7, Problem 8TY
Summary Introduction
Introduction: Phosphorylation, for the generation of ATP, may occur in cells by oxidative phosphorylation, such as in the Kreb’s cycle or by substrate-level phosphorylation, such as in glycolysis. In oxidative phosphorylation, electrons flow through a series of electron carriers by several
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If 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 decrease
Glycolysis is regulated primarily by _______________.
a. three strongly exergonic, non-equilibrium reactions.
b. three strongly endergonic, non-equilibrium reactions.
c. allosteric effectors of pyruvate kinase.
d. phosphorylation of phosphofructokinase.
e. the availability of glucose-6-phosphate.
Which of the following statements concerning ATP synthesis is NOT true?
a.
The open conformation of the ATP synthase is for releasing ATP.
b.
The gamma subunit in the stalk responds to the flow of H+ and rotates the assembly counterclockwise and thus change the conformations of the active site to synthesize ATP.
c.
The tight conformation of the ATP synthase is for converting ADP and phosphate to ATP.
d.
The loose conformation of the ATP synthase is for binding ADP and phosphate.
e.
Ten protons are required to catalyze the rotation of the subunits so that one ATP is synthesized.
Clear my choice
Chapter 7 Solutions
Biology
Ch. 7.2 - Core Skill: Connections Look ahead to Table 45.1....Ch. 7.2 - Which organic molecules donate a phosphate group...Ch. 7.2 - Prob. 2CSCh. 7.4 - Prob. 1CCCh. 7.5 - Explain the meaning of the name cytochrome...Ch. 7.6 - Prob. 1CCCh. 7.6 - Prob. 1CSCh. 7.6 - Prob. 1EQCh. 7.6 - CoreSKILL In the experiment of Figure 7.13, what...Ch. 7.6 - Prob. 3EQ
Ch. 7.7 - Prob. 1CCCh. 7 - Which of the following pathways occurs in the...Ch. 7 - Prob. 2TYCh. 7 - Prob. 3TYCh. 7 - Which organic molecule supplies a two-carbon group...Ch. 7 - The ability to diagnose tumors using...Ch. 7 - Prob. 6TYCh. 7 - Certain drugs, which are called ionophores, cause...Ch. 7 - Prob. 8TYCh. 7 - Prob. 9TYCh. 7 - Prob. 10TYCh. 7 - Prob. 1CQCh. 7 - What causes the rotation of the subunit of ATP...Ch. 7 - Core Concept: Energy and Matter How is glucose...Ch. 7 - Discuss the advantages and disadvantages of...Ch. 7 - Prob. 2COQ
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- In 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_forwardThe conversion of 1 mol of fructose 1,6-bisphosphate to 2 mol of pyruvate by the glycolytic pathway results in a net formation of: a. 1 mol of NAD+ and 2 mol of ATP. b. 1 mol of NADH and 1 mol of ATP. c. 2 mol of NAD+ and 4 mol of ATP. d. 2 mol of NADH and 2 mol of ATP. e. 2 mol of NADH and 4 mol of ATP.arrow_forwardATP 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_forward
- Which of the following statements about the use the NADPH generated from the pentose phosphate pathway is not true? NADPH generated from the pentose phosphate pathway is used for the synthesis of fatty acids. b. NADPH generated from the pentose phosphate pathway and cytoplasmic NADH is metabolically interchangeable. O c. NADPH generated from the pentose phosphate pathway is used for the regeneration of glutathione to its reduced state. O d. NADPH generated from the pentose phosphate pathway is used for lipid synthesis. Clear my choicearrow_forwardThe steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all of the following except: a. ATP synthesis. b. catalysis by phosphoglycerate kinase. c. oxidation of NADH to NAD+. d. the formation of 1,3-bisphosphoglycerate. e. utilization of Pi.arrow_forwardSince in this patient pyruvate kinase is abnormal not only is less pyruvate made but intermediates above pyruvate in the glycolytic pathway build up slowing the pathway. which of the following would be expected? A.ADP to ATP ratios would be elevated above normal. B.NADP+ would increase relative to NADPH. C.Ribulose 5-phosphate levels would decrease. D.NADH to NAD+ ratios would decrease. E.Methemoglobin levels would increase. Explanation for answer in no. 6:arrow_forward
- Which of the following is true concerning glycolysis? A. It is an aerobic process. B. A net of 2 molecules of ATP are produced. C. A total of 38 ATP are produced. D. 4 NADH are produced.arrow_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_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_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_forwardThe first reaction in glycolysis that results in the formation of an energy-rich compound (i.e., a compound whose hydrolysis or oxidation has a highly negative ΔG'°) is catalyzed by: a. glyceraldehyde 3-phosphate dehydrogenase. b. hexokinase. c. phosphofructokinase-1. d. phosphoglycerate kinase. e. triose phosphate isomerase.arrow_forwardWhich 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 .arrow_forward
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