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Enzyme Kinetics

Enzyme Kinetics (Michaelis Menten/Lineweaver Burke/Eadie-Hostee)

QuestionAnswer
What is the Michaelis Menten equation? v=Vmax [S] / [S] + Km
Define Vmax. The rate of the reaction at saturation substrate concentrations for a given amount of enzyme.
The rate of the reaction at saturation substrate concentrations for a given amount of enzyme defines what concept? Vmax
Define Km. The substrate concentration that results in 50% Vmax.
The substrate concentration that results in 50% Vmax defines what? Km
An inhibitor that binds to the active site and competes with the substrate for its occupation is called a _________ inhibitor. Competitive inhibitor
An inhibitor that binds to, and takes an enzyme out of commission is called a ____________ inhibitor. Noncompetitive inhibitor
Competitive inhibitors ____________ (increase / decrease) the apparent Km. Increase
In a Lineweaver Burke plot, a competitive inhibitor will have _______________ (same / different) point on the x axis. Different
In a Lineweaver Burke plot, a noncompetitive inhibitor will have _______________ (same / different) point on the x axis. Same
In a Lineweaver Burke plot, a competitive inhibitor will have _______________ (same / different) point on the y axis. Same
In a Lineweaver Burke plot, a noncompetitive inhibitor will have _______________ (same / different) point on the y axis. Different
This type of inhibitor binds to the active site and is acted upon by the enzyme just as if it was a normal substrate. The enzyme uses its own catalytic machinery to inactivate itself. Suicide inhibitor
Fluorouracil is what type of inhibitor? Suicide inhibitor
The Y axis on the Lineweaver Burke plot indicates ___________. 1/Vmax
The X axis on the Lineweaver Burke plot indicates ____________. -1/Km
The Y axis on the Eadie-Hofstee plot indicates _________. Vmax
The X axis on the Eadie-Hofstee plot indicates _________. Vmax/Km
The slope of the Eadie-Hofstee plot indicates __________. -Km
True or False: Both competitive and noncompetitive inhibition is reversible. True
True or False: Both competitive and noncompetitive inhibition is irreversible. False
Created by: P1StudyStack on 2008-12-13



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