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Enzymes and Kinetics

Q1: A competitive inhibitor of an enzyme is usually

A a highly reactive compound

B a metal ion such as Hg2+ or Pb2+

C structurally similar to the substrate.

D water insoluble

ANS:C - structurally similar to the substrate.

A chemical agent which is structurally analogous to the substrate can "COMPETE" with the actual substrate to occupy the active site of an enzyme. This phenomenon reduces the probability of picking the substrate by enzymes. So, that the enzymatic kinetics of that reaction is altered.



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