ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
4th Edition
ISBN: 9781265521363
Author: McKinley
Publisher: MCG
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Chapter 3, Problem 4DYKB
ATP inhibits phosphofructokinase by binding to an allosteric site in glycolysis. ATP is functioning as a
- a. competitive inhibitor.
- b. competitive activator.
- c. noncompetitive inhibitor.
- d. noncompetitive activator.
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ATP inhibits glycolysis by binding to an allosteric site on the last enzyme In the pathway, thus ATP is a...
A. Competitive inhibitor
B. Noncompetitive inhibitor
C. Feedback inhibitor
D. More than one of these answers.
Please give the rationale as to why
One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency and the enzyme lacks zinc, it would be referred to as the:
a. apoenzyme.
b. coenzyme.
c. holoenzyme.
d. prosthetic group.
e. substrate.
Which of the following statements concerning the enzyme regulation is CORRECT?
Select one:
A.
Citrate is the allosteric inhibitor of hexokinase.
B.
AMP is the alloseric activator of pyruvate dehydrogenase.
C.
Glucose-6-phosphate is the allosteric activator for phosphofructokinase.
D.
ATP is the activator of pyruvate kinase.
Chapter 3 Solutions
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
Ch. 3.1 - Both the movement of Na+ down its concentration...Ch. 3.1 - Muscle contraction is an example of what form of...Ch. 3.1 - Prob. 3WDYLCh. 3.2 - Prob. 4WDYLCh. 3.2 - For a biochemical reaction that involves simple...Ch. 3.2 - What molecule is formed from exergonic reactions...Ch. 3.2 - Explain what occurs when the equilibrium is...Ch. 3.2 - Explain the effect a fever would have on chemical...Ch. 3.3 - What is the relationship of enzymes and activation...Ch. 3.3 - What is the active site of an enzyme and how does...
Ch. 3.3 - What is the mechanism of enzyme action, including...Ch. 3.3 - Explain how enzymes are generally named.Ch. 3.3 - How do changes in substrate concentration,...Ch. 3.3 - How are enzymes regulated through competitive and...Ch. 3.3 - Prob. 15WDYLCh. 3.3 - Prob. 16WDYLCh. 3.4 - Prob. 17WDYLCh. 3.4 - Prob. 18WDYLCh. 3.4 - Prob. 19WDYLCh. 3.4 - Prob. 20WDYLCh. 3.4 - Prob. 21WDYLCh. 3.4 - Prob. 22WDYLCh. 3.4 - Prob. 23WDYLCh. 3.4 - Prob. 24WDYLCh. 3.4 - Prob. 25WDYLCh. 3.4 - Prob. 26WDYLCh. 3.4 - Prob. 27WDYLCh. 3.4 - Prob. 28WDYLCh. 3 - Energy in ATP is used to power skeletal muscle...Ch. 3 - Prob. 2DYKBCh. 3 - Prob. 3DYKBCh. 3 - ATP inhibits phosphofructokinase by binding to an...Ch. 3 - All of the following are accurate about enzymes...Ch. 3 - Prob. 6DYKBCh. 3 - Prob. 7DYKBCh. 3 - All stages of cellular respiration are decreased...Ch. 3 - Prob. 9DYKBCh. 3 - Prob. 10DYKBCh. 3 - Prob. 11DYKBCh. 3 - Describe the different ways of classifying...Ch. 3 - Prob. 13DYKBCh. 3 - Describe the structure and mechanism of enzymes.Ch. 3 - Prob. 15DYKBCh. 3 - Prob. 16DYKBCh. 3 - In general terms, explain the fate of pyruvate if...Ch. 3 - Describe how oxygen becomes part of water during...Ch. 3 - Identify the source of carbon in carbon dioxide.Ch. 3 - Prob. 20DYKBCh. 3 - Prob. 1CALCh. 3 - Prob. 2CALCh. 3 - Another challenge to a patient with impaired...Ch. 3 - Prob. 4CALCh. 3 - Prob. 5CALCh. 3 - Prob. 1CSLCh. 3 - Prob. 2CSLCh. 3 - What occurs to the amount of product formed in a...
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- 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.arrow_forwardDoes the following inhibitors decrease ATP production or Blocks ATP production? a. DCCD b. FCCP c. Amytal d. Carboxin e. Cyanidearrow_forwardGlycolysis 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.arrow_forward
- Which of the following is incorrect about the ATP synthase mechanism? a. It explains how ATP is hydrolyzed into ADP and Pi b. At any moment, each catalytic site has a different conformation and binding affinity c. It is called the binding change mechanism d. It involves rotation-driven conformational changes that alter the affinity of each catalytic subunitarrow_forwardWhich of the following is FALSE about glycolysis? a. The pathway axidizes two moles of NADH to NAD* for each mole of glucose. b. The pathway requires two moles of ATP to get started catabolizing each mole of glucose. c. ADP is phosphorylated to ATP via substrate -level phosphorylation. d. The pattivay produces pyruvate as one of its products.arrow_forwardWhat is / are the advantages of having a step by step breakdown pathway? Select all the correct answers. Select one or more: a.Creates multiple point of regulation b.controlled capture of released energy c.multiple entry points for breakdown substrates d.generates intermediates that can be used in anabolic metabolismarrow_forward
- Enzymes increase a reaction’s rate by a. changing its equilibrium constant to a more favorable value. b. using specific prosthetic groups c. decreasing the reaction’s activation energy d. decreasing the reaction’s ΔG valuearrow_forwardWhich of the following is associated with the process of ATP re-synthesis during exercise? a. The energy necessary is captured, in part, by the oxidation of electron transporter molecules (NADH, FADH2) b. Reliant upon release of stored energy obtained from dietary intake c. A process that requires energy as a substrate in order to drive the biochemistry of re-synthesis d. Facilitated through a blending of both anaerobic and aerobic metabolic pathways e. All of the above are true f. Only B and D are truearrow_forwardWhich 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_forward
- Based on their roles in the metabolic process, classify the following substances as an oxidizing agent, reducing agent or neither. a. FADH2 b. ATP c. NAD+ d. NADH e. GTParrow_forwardGlycolysis "uses" ATP by: A. substrate-level phosphorylation B. oxidative phosphorylation C. reducing CO2 D. anabolismarrow_forwardWhat might you expect if a mutation caused the ATP-allosteric site on phosphofructokinase to be permanently inactive? a. Less glucose transported into the cell. b. No effect on ATP production. c. Decreased ATP production d. Excessive ATP production.arrow_forward
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