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Course: Content items for courses > Unit 3

Lesson 5: Big Idea 4: Biological systems interact, and these systems and their interactions possess complex properties.

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EU 4.B - Competition & coordination of biological systems

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The graph shows an enzyme-catalyzed reaction at increasing substrate concentrations. All other factors remain constant.

Which of the following would occur if a noncompetitive inhibitor was added to the reaction at a high substrate concentration?

(Choice A)
The inhibitor will bind with the substrate, increasing the rate of reaction.
(Choice B)
The inhibitor will cause an increase in temperature, increasing the rate of reaction.
(Choice C)
The inhibitor will compete for the active site, decreasing the rate of reaction.
(Choice D)
The inhibitor will bind with an allosteric site, decreasing the rate of reaction.

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Video 4 minutes 55 seconds

Noncompetitive inhibition