Where do allosteric effectors bind on an enzyme?

CHEM150 CH6-8

Quiz
•
Chemistry
•
University
•
Hard
Emilie Hingray
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
They always bind at the catalytic site.
They always bind at a site different from the catalytic site.
They can bind at either the catalytic site or at a different site.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In the induced-fit model of substrate binding to enzymes, what happens?
There is a conformational change of the catalytic site when the substrate binds.
There is aggregation of several enzyme molecules when the substrate binds.
The substrate changes its conformation to fit inside the catalytic site.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the main thermodynamics-related difference between a catalyzed and a non-catalyzed reaction?
Both activation energy and net free energy change are null for the catalyzed reaction.
The activation energy change of the catalyzed reaction is the lowest of the 2 reactions.
The net free energy change of the catalyzed reaction is the lowest of the 2 reactions.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is true?
Allosteric enzymes are rarely important in the regulation of metabolic pathways.
Michaelis-Menten kinetics model the mechanism of allosteric enzymes.
An hyperbolic representation of the relation initial velocity vs [S] is a specific characteristic of an allosteric enzyme's behavior.
None of these is true.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is hindrate a competitive inhibitor, irreversible inhibitor, or noncompetitive inhibitor?
Competitive inhibitor
Irreversible inhibitor
Noncompetitive inhibitor
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following types of inhibitor binds reversibly to the enzyme at the same site as the substrate without altering the overall enzyme structure?
Noncompetitive inhibitor
Competitive inhibitor
Irreversible inhibitor
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does amphipathic mean?
Having both positive and negative charges.
Having both acid and base properties.
Having both hydrophilic and hydrophobic regions.
Having two stereoisomers.
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