| Item I | Item II |
|---|---|
| (A) Allostericeffect | (P) Molecule bindingto the active siteof enzyme |
| (B) Competitiveinhibitor | (Q) Molecule crucialforcommunication inthe body |
| (C) Receptor | (R) Molecule bindingto a site other thanthe active site ofenzyme |
| (D) Poison | (S) Molecule bindingto the enzymecovalently |