Which one of the following statements is inco | vedclass

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(B) The correct answer is $B$. Competitive inhibition is a reversible process where the inhibitor competes with the normal substrate for the active si

Vedclass · Accepted Answer

The presence of the competitive inhibitor decreases the $K_m$ of the enzyme for the substrate.

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(B) The correct answer is $B$. Competitive inhibition is a reversible process where the inhibitor competes with the normal substrate for the active site of the enzyme.In competitive inhibition,the inhibitor is structurally similar to the substrate,allowing it to bind to the active site. This binding prevents the substrate from binding,thereby reducing the enzyme's affinity for the substrate.The $K_m$ value (Michaelis constant) represents the substrate concentration at which the reaction velocity is half of the maximum velocity $(V_{max})$. $A$ higher $K_m$ indicates lower affinity. Since a competitive inhibitor reduces the apparent affinity of the enzyme for the substrate,it increases the $K_m$ value,not decreases it. Therefore,statement $B$ is incorrect.Statement $A$ is correct because the inhibitor does not affect the catalytic step $(k_{cat})$ once the enzyme-substrate complex is formed. Statement $C$ is correct as the binding is reversible. Statement $D$ is correct because the inhibitor is not a substrate and is not chemically modified by the enzyme.

Which one of the following statements is incorrect?

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