Question Detail
Question
Which of the following is a key distinguishing feature of a Gram-negative bacterial cell wall that is absent in Gram-positive bacteria?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Gram-negative bacterial cell walls have a thin layer of peptidoglycan and an outer membrane that contains phospholipids, proteins, and lipopolysaccharide (LPS). Gram-positive cell walls, on the other hand, are characterized by a relatively thick layer of peptidoglycan and the presence of teichoic acids.
Hint
Consider the unique structural component found outside the peptidoglycan layer in one type of Gram-stained bacteria.