Which of the following correctly identifies key elements present on the exterior of Gram-negative (GN) and Gram-positive (GP) bacteria?
A) GN: single lipid bilayer; GP: two lipid bilayers
B) GN: single peptidoglycan layer; GP: multiple peptidoglycan layers
C) GN: extensively crosslinked peptidoglycans; GP: uncrosslinked peptidoglycan
D) GN: contains both N-acetylmuramic acid and N-acetylglucosamine; GP: contains only N-acetylmuramic acid
E) none of the above
Correct Answer:
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