Many pharmaceuticals exert their action by inhibiting the activity of enzymes. Choosethe false statement regarding enzyme inhibition.A- Enzyme can be inhibited by a ligand that binds to an active siteB- Enzyme can be inhibited by a ligand that binds to a site other than that ofsubstrateC- Enzyme can be inhibited by a ligand that forms a covalent bond with enzyme.D- It is true of all enzyme inhibitors, that the degree of inhibition is reduced when theconcentration of inhibitor is lowered by metabolism orE- Enzyme may be inhibited by a ligand that does not bind in the substrate site

Enzyme inhibition occurs when certain substances, called inhibitors bind to and inactivate enzymes.…

Answered: Many pharmaceuticals exert their action…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Similar questions

An inhibitor always binds to the allosteric site of an enzyme. O True False
Figure 6-33 (Subunit interactions in an allosteric enzyme, and interactions with inhibitors and activators) depicts allosteric modulation of an enzyme through non-covalent interactions. What features of an activator might lead to different levels of enzyme regulation? Select one or more: a. ability to cause a conformational change that results in an altered activity. b. affinity for the regulatory site c. boiling point d. bond flexibility (i.e. abundance of freely rotating single bonds instead of more rigid bonds like double bonds) e. molecular weight
To investigate the effects of a newly discovered inhibitor and enzymology list obtained the results showed in the figure below. Which statement best describes the binding of its inhibitor on the enzyme? ~y=0.768r+4.7425 3-0.568x+46576 19 . . . . ● x X The inhibitor binds at the active site. The inhibitor binds away from the active site, but after substrate binding. The inhibitor binds away from the active site before or after substrate binding. The inhibitor binds close to the active site, but after substrate binding. The inhibitor binds close to the active site, but prior to substrate binding. red by a strain
Which statement is NOT completely true? O Cyanide, a poison, is an example of a reversible inhibitior. O noncompetitive inhibitors do not compete with substrates but have their own special site to bind called an allosteric site O noncompetitive inhibitors are molecules which decrease allosteric enzyme activity O Increased Creatine kinase in the blood may indicate a heart attack (caused by ruptured heart cells leaking the enzyme into the bood) O Reactants that are catalyzed are called substrates.
Which statements are true of an inhibitor that binds the active site of an enzyme? Select all that apply, there may be one correct answer or several. a These inhibitors are a kind of allosteric regulator that decreases enzyme activity. b Adding more substrate can reduce the effect of these inhibitors. c These inhibitors compete with the substrate for the active site of the enzyme. d These inhibitors increase the rate of enzyme activity. e These inhibitors function by changing the shape of the enzyme, stopping if from binding to substrate.
Identify the type of inhibition (competitive, noncompetitive, uncompetitive)
The effect of on the activity of an enzyme can usually be overcome by increasing the concentration of substrate(s). Choose the best answer the phosphorylation of the R groups of serine (S), threonine (T) and tyrosine (Y) an allosteric effector a noncompetitive inhibitor a competitive inhibitor
Which of the following statement is FALSE ? pKa values of active site residues can be shifted from typical pKa values Enzymes increase Keq Near attack complexes have reacting molecules close enough to form Va der Waals contacts The transition state contains at least one partial bond. QUESTION 12 The angle o in a peptide best describes: O the angle between the two peptide bonds O the angle between the alpha carbon (Ca) and the amide O the angle between the alpha carbon (Ca) and the carbonyl O the angle between the alpha carbon (Ca) and its side chain QUESTION 13 Investigating how protein subunits come together studies: super- secondary structure Click Save and Submit to save and submit. Click Save All Ansuers to save all anscers 7977 Mostly cloody
Choose the plot that best reflects the activity of an enzyme inhibited irreversibly. 100% A C D time A D C B Enzyme Activity
Catalysis through proximity and orientation effects involves: (select all that applies) Group of answer choices binding of acidic and/or basic groups in the binding site facilitating chemical reactions by binding substrates close to specific groups binding of substrate in specific, restrictive orientations depending on metal ions for catalysis
Which of the following best explains why enzyme catalysis is affected by a change in pH? A. Change in pH alters ionization states of serine in the active site involved in nucleophilic catalysis B. The ionization states of his, asp and glu involved in acid/base catalysis are altered with change in pH C. Change in pH alters ionization states of contact amino acids in the active site D. All enzymes have optimum pH
enzymes are naturally occurring catalysts responsible for various biochemical reactions. Give a modern and recent application of an enzyme used in a biochemical reaction a - the commercial or trade name of the catalyst and enzyme. b - the properties of the catalyst and enzyme (e.g., shape, size, colour, price). c - the advantages and the disadvantages of the chosen catalyst and enzyme d - catalytic reaction (e.g., the reactant, product, reaction equation, phase, selectivity, promoter, catalyst support, operating temperature & pressure).

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