BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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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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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
During glycolysis, the major energy generating step involves:
pyruvate kinase
phosphoglycerate kinase
Phosphofructokinase
glyceraldehyde-3 -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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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
- 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 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 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_forward
- Which of the following statements about the Krebs Cycle is true? There may be more than one answer. Select any and all that apply. It is a linear 10 step pathway It generates ATP molecules directly through oxidative phosphorylation It produces two molecules of carbon dioxide It begins with acetyl coenzyme A and oxaloacetate combining It converts glucose to carbon dioxide It is a point of entry for the products of amino acid catabolism to be converted into energy It is an anaerobic process that produces molecules for an aerobic process that comes later The first step is the breakdown of glucose into glyceraldehyde-3-phosphatearrow_forwardComplete the table belowarrow_forwardRegarding 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_forward
- Sort 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_forwardDuring glycolysis (under anaerobic conditions), for each glucose molecule broken down, how many ATP molecules are used and how many are made in total? A diagram summarizing the different reactions of glycolysis is given below. ATP ADP ATP ADP Glucose Glucose-6-phosphate Fructose-6-phosphate Fructose-1,6-bisphosphate Dihydroxyacetone phosphate 2 (Glyceraldehyde-3-phosphate) Glyceraldehyde- 3-phosphate 2 (1,3-Bisphosphoglycerate) 2 (3-Phosphoglycerate) 2 (2-Phosphoglycerate) 2 H₂O 2 (Phosphoenolpyruvate) 2 (Pyruvate) 2 NAD+ + 2Pi 2 NADH + 2H 2 ADP 2 ATP -2 ADP 2 ATP 2 ATP molecules are used and 2 ATP molecules are made 2 ATP molecules are used and 4 ATP molecules are made O 6 ATP molecules are used and no ATP molecules are made O 4 ATP molecules are used and 2 ATP molecules are made O No ATP molecules are used and 6 ATP molecules are madearrow_forwardThe phosphorylation catalyzed by hexokinase is essentially an irreversible reaction. Which of the following statements is most likely to be true under cellular conditions? In all cases, note that dephosphorylation specifically refers to hydrolysis in which a phosphate is lost. ATP dephosphorylation is more exergonic than glucose 6-phosphate dephosphorylation. ATP dephosphorylation is less exergonic than glucose 6-phosphate dephosphorylation. There is not enough information to determine which reaction is more exergonic.arrow_forward
- Can someone help with this question?arrow_forwardIn the following diagram of glycolysis. Identify the steps that are amphibolic, taking place in both glycolysis and gluconeogenesis. Also, identify the regulated steps and what compounds act as regulators.arrow_forwardHow many ATP or NADH molecules are produced or required in each of the following steps in glycolysis? Match the words in the left column to the appropriate blanks in the sentences on the right. zero one two produced required In the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, NADH molecules are In the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate, NADH molecules are In the conversion of phosphoenolpyruvate to pyruvate molecules are ATP and Reset ATP and ATP and Help NADHarrow_forward
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