Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 7, Problem 17RQ
The control of which enzyme exerts the most control on glycolysis?
- hexokinase
- phosphofructokinase
- glucose-6-phosphatase
- aldolase
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Which reaction in glycolysis produces ATP as a product?
Group of answer choices
hexokinase
glyceraldehyde-3-phosphate dehydrogenase
pyruvate kinase
aldolase
All of the following are true statements concerning glycolysis EXCEPT:
It occurs in the cytoplasm of the cell.
It uses, as well as produces, ATP
It produces ATP by oxidative phosphorylation.
It involves the conversion of a molecule of glucose into two molecules of pyruvic acid.
It is also called the Embden-Meyerhof pathway.
Question 20
A high NADH/NAD+ ratio will inhibit which pathways or enzymes by LeChatelier’s principle:
Options:
PDC
Glycolysis
Gluconeogenesis
b-oxidation
isocitrate dehydrogenase
malate dehydrogenase
Chapter 7 Solutions
Biology 2e
Ch. 7 - Figure 7.11 Dinitrophenol (DNP) is an "uncoupler"...Ch. 7 - Figure 7.12 Cyanide inhibits cytochrome c oxidase,...Ch. 7 - (Figure 7.14) Tremetol, a metabolic poison found...Ch. 7 - The energy currency used by cells is ATP ADP AMP...Ch. 7 - A reducing chemical reaction. reduces the compound...Ch. 7 - During the second half of glycolysis, what occurs?...Ch. 7 - What is removed from pyruvate during its...Ch. 7 - What do the electrons added to NAD+ do? They...Ch. 7 - GTP or ATP is produced during the conversion of...Ch. 7 - How many NADU molecules are produced on each turn...
Ch. 7 - What compound receives elections from NADH? FMN...Ch. 7 - Chemiosmosis involves. the movement of electrons...Ch. 7 - Which of the following fermentation methods can...Ch. 7 - A major connection for sugars in glycolysis is...Ch. 7 - Beta-oxidation is. the breakdown of sugars the...Ch. 7 - The effect of high levels of ADP is to__inv __...Ch. 7 - The control of which enzyme exerts the most...Ch. 7 - Why is it beneficial for cells to use ATP rather...Ch. 7 - Nearly all organisms on Earth carry out some form...Ch. 7 - Because they lose their mitochondria during...Ch. 7 - What is the primary difference between a circular...Ch. 7 - How do the roles of ubiquinone and cytochrome c...Ch. 7 - What accounts for the different number of ATP...Ch. 7 - What is the primary difference between...Ch. 7 - Would you describe metabolic pathways as...Ch. 7 - How does citrate from the citric acid cycle affect...Ch. 7 - Why might negative feedback mechanisms be more...
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- Several of the enzymes of glycolysis fall into classes that we will see often in metabolism. What reaction types are catalyzed by each of the following: Kinases Isomerases Aldolases Dehydrogenasesarrow_forwardDuring glycolysis, the major energy generating step involves: pyruvate kinase phosphoglycerate kinase Phosphofructokinase glyceraldehyde-3 -dehydrogenasearrow_forwardWhich enzyme is used in gluconeogenesis that bypasses step 1 of Glycolysis in the production of free glucose from Glucose 6-phosphate? Group of answer choices Hexokinase Glucose 6 phosphatase Glucokinase Glucose 1-phosphatasearrow_forward
- iodoacetate is an irreversible inhibitor of glyceraldehyde-3-phosphate dehydrogenase. which of the following is the expected outcome of the exposure of a cell to iodoacetate - Cellular resiration will stop if the cell solely depends on glucose as fuel - The rate of cellular respiration will increase - The reoxidation of coenzymes will noy be affected , but the efficiency of oxidative phosphorylation will be diminished - There will be no effect on cellular respiration as long as the cell has a large glucose reserve -The cell sill not be able to reoxidize the reduced coenzymesarrow_forwardWhich of the following cellular concentrations would be likely to increase the rate of glycolysis? Low AMP levels High glucagon levels ✓Low fructose-2,6-bisphosphate levels High AMP levels High phosphoenolpyruvate levels Low ATP levelsarrow_forwardWhich enzyme catalyzes a freely reversible reaction? Pyruvate dehydrogenase Aconitase α-Ketoglutarate dehydrogenase Citrate synthase Please select only one answer.arrow_forward
- Which of the following glycolytic enzymes catalyzes the conversion of fructose-1,6-bisphosphate into the two product molecules dihydroxyacetone phosphate, and glyceraldehyde-3-phosphate? phosphoglycerate kinase pyruvate kinase malate dehydrogenase aldolase phosphofructokinasearrow_forwardWhich of the following enzyme catalyzes the first step of glycolysis? Group of answer choices Hexokinase Pyruvate kinase Glucokinase Phosphofructokinasearrow_forwardWhich of the following glycolytic enzymes must consume ATP during phosphorylation of its preferred substrate molecule? phosphoglycerate mutase pyruvate kinase succinate dehydrogenase hexokinase phosphoglycerate kinasearrow_forward
- Regarding pathways that feed glycolysis, which of the following statements is false? Mannose is also a substrate of hexokinase. Galactose requires UDP-glucose in its conversion to fructose-6-phosphate. Fructose is phosphorylated by hexokinase in muscle cells. Glucose-6-phosphatase is part of the pathway that breaks down glycogen in muscle cells.arrow_forwardSort the following metabolic enzymes according to those involved only in glycolysis and those involved only in gluconeogenesis. (Note: Some of the enzymes may not be used.) Items (10 items) (Drag and drop into the appropriate area below) Fructose-1,6- bisphosphatase- 1 Categories Phosphoglycerat e kinase Aldolase Glycolysis Only Pyruvate kinase Enolase Gluconeogenesis Only Phosphofructoki nase-1 Phosphoenol uvate carboxykinasarrow_forwardIdentify the stage of catabolism where the following processes occur: a. Hydrolysis of triacylglycerol with lipaseb. Oxidation of fatty acid to acetyl CoAc. Conversion of ADP to ATP with ATP synthased. Reaction of oxygen with protons and electrons to form watere. Cleavage of a protein with chymotrypsinarrow_forward
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