Question

multiple choice question
the active part of the penicillin structure is the ______ ring.
○ beta - lactam
○ phenol
○ thiazolidine
○ benzene
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Explanation:

Penicillin's active part is the beta - lactam ring, which is responsible for its antibacterial activity by inhibiting bacterial cell wall synthesis. Phenol is a hydroxyl - benzene compound, benzene is a simple aromatic ring, and thiazolidine is a different heterocyclic structure, none of which are the active part of penicillin.

Answer:

A. beta - lactam