Question

Penicillins act by inhibiting ______.

• A. cell membrane synthesis
• B. DNA gyrase
• C. cell wall synthesis
• D. protein synthesis

Hint:

Penicillins block bacterial cell wall formation—specifically peptidoglycan cross-linking.

Answer 1

The Correct Option is C

Penicillins are $\beta$-lactam antibiotics that inhibit bacterial cell wall synthesis by targeting the transpeptidase enzyme involved in cross-linking peptidoglycan layers. This weakens the cell wall, leading to cell lysis and bacterial death.