[Campbell Biology P.623] Based on the provided text, which statement correctly describes asp... | Practice Question

Based on the provided text, which statement correctly describes aspects of bacterial cell walls or related medical interventions?

  • A: The Gram stain technique uses only crystal violet and iodine to differentiate bacterial species.
  • B: All bacterial cell walls contain peptidoglycan, while archaeal cell walls do not.
  • C: Penicillin works by inhibiting the cross-linking of peptidoglycan, which compromises the bacterial cell wall's integrity.
  • D: Gram-positive bacteria are generally more resistant to antibiotics than Gram-negative bacteria.

Explanation

The text explicitly states that 'The effectiveness of certain antibiotics, such as penicillin, derives from their inhibition of peptidoglycan cross-linking.' This directly supports option C. Options A, B, and D contain inaccuracies as described in their respective feedbacks.