Which type of inhibitor is considered a "suicide inhibitor"?

The correct answer identifies a "suicide inhibitor" as a type of irreversible inhibitor. A suicide inhibitor works by binding to an enzyme in such a way that it is converted into an active form that permanently inactivates the enzyme. During this process, the inhibitor becomes covalently bonded to the enzyme, leading to a permanent loss of enzymatic activity. This contrasts with reversible inhibitors, which bind to enzymes non-covalently and can dissociate, allowing for restoration of enzyme function.

This irreversible action is a key feature of suicide inhibitors, as they effectively "commit suicide" by modifying the enzyme they target in a manner that prevents any further catalytic activity. Understanding this mechanism highlights the significance of enzyme regulation and the nuances of inhibitor types in biochemical pathways.