In the CEM context, Penicillin belongs to which class of antibiotics?

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Multiple Choice

In the CEM context, Penicillin belongs to which class of antibiotics?

Penicillin is part of the beta-lactam family, defined by the presence of a beta-lactam ring in their chemical structure. That ring is essential because it binds to penicillin-binding proteins and inhibits the transpeptidase enzymes responsible for cross-linking peptidoglycan in the bacterial cell wall. Without proper cross-linking, the cell wall weakens and the bacterium cannot maintain its shape, especially when actively growing, leading to bacterial death. Other classes work through different mechanisms, which is why they aren’t correct here: macrolides bind the 50S ribosomal subunit to block protein synthesis; aminoglycosides bind the 30S ribosomal subunit causing misreading of mRNA; fluoroquinolones inhibit DNA gyrase and topoisomerase IV, preventing DNA replication.

Penicillin is part of the beta-lactam family, defined by the presence of a beta-lactam ring in their chemical structure. That ring is essential because it binds to penicillin-binding proteins and inhibits the transpeptidase enzymes responsible for cross-linking peptidoglycan in the bacterial cell wall. Without proper cross-linking, the cell wall weakens and the bacterium cannot maintain its shape, especially when actively growing, leading to bacterial death.

Other classes work through different mechanisms, which is why they aren’t correct here: macrolides bind the 50S ribosomal subunit to block protein synthesis; aminoglycosides bind the 30S ribosomal subunit causing misreading of mRNA; fluoroquinolones inhibit DNA gyrase and topoisomerase IV, preventing DNA replication.

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