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An example of competitive inhibition of ...

An example of competitive inhibition of an enzyme is the inhibition of

A

succinic dehydrogenase by malonc acid

B

cytochrome oxidase by cyanide

C

hexokinase by glucose - 6 - phosphate

D

carbonic anhydrase by carbon dioxide.

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The correct Answer is:
A
An example of competitive inhibition of an enzymes is the inhibition of succinic dehydrogenase by malonic acid . It is the simple type of competitive inhibition. A competitive inhibitor resembles the substrate and binds to the active site of the enzyme. The substrate is then prevented from blinding to the same active site.
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Assertion : The inhibition of activity of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure is the example of competitive inbhibition. Reason : Competitive inhibition is the inhibition of enzyme activity when inhibitor closely resembles the substrate, in its molecular structre.

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