試題詳解

19. 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