Beta-lactam antibiotics (penicillins) work by:

A Inhibiting protein synthesis

B Inhibiting bacterial cell wall synthesis by binding penicillin-binding proteins

C Inhibiting DNA synthesis

D Disrupting cell membranes

✓ Correct Answer: Option B

Beta-lactam ring binds PBPs, preventing peptidoglycan cross-linking → weakened cell wall → osmotic lysis of bacteria.

💡 Why is B) the correct answer?

The correct answer to the question "Beta-lactam antibiotics (penicillins) work by:" is Option B: Inhibiting bacterial cell wall synthesis by binding penicillin-binding proteins.

The other options — A) Inhibiting protein synthesis, C) Inhibiting DNA synthesis, D) Disrupting cell membranes — are incorrect for this Everyday Science question. As explained above: Beta-lactam ring binds PBPs, preventing peptidoglycan cross-linking → weakened cell wall → osmotic lysis of bacteria.

📚 About This Everyday Science Practice Question

This 2-level Everyday Science question from the Human Body & Biology topic is part of One Paper Preparation's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free Everyday Science practice test or use flashcards for spaced repetition review.

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Beta-lactam antibiotics (penicillins) work by:

✓ Correct Answer: Option B

📚 About This Everyday Science Practice Question

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