57. Many bacteria have thick, rigid extracellular walls that protect them from osmotic lysis. Which of the following is   NOT   found in the cell wall of gram-positive bacteria?
(A) Pentaglycine
(B) N-Acetylglucosamine
(C) N-Acetylmuramic acid
(D) Cellulose

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統計: A(0), B(0), C(0), D(1), E(0) #2753866

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