题目内容

Which part of lipopolysaccharide in Gram negative cell wall is applied to determine the biotype of gram bacterium?

A. lipid A
B. specific polysaccharide
C. core polysaccharide
D. outer protein

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Which statement is not right about Gram-positive bacteria?

A. They have a thick cell wall, which retains crystal violet dye,
B. They contain teichoic acids in their cell walls,
C. They appear purple after Gram staining,
D. They have periplasmic space in the cell wall.

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In the peptidoglycan, tetrapeptide side chain is linked with NAM in chain of bisaccharide backbone.

A. 对
B. 错

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THe out membrane of Gram negative cell wall is symmetric bilipid layer.

A. 对
B. 错

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THE specific polysaccharide of lipopolysaccharide is called O-antigen of bacteria.

A. 对
B. 错

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Which part of lipopolysaccharide in Gram negative cell wall is applied to determine the biotype of gram bacterium?

A. lipid A B. specific polysaccharide C. core polysaccharide D. outer protein

Which statement is not right about Gram-positive bacteria?

In the peptidoglycan, tetrapeptide side chain is linked with NAM in chain of bisaccharide backbone.

THe out membrane of Gram negative cell wall is symmetric bilipid layer.

THE specific polysaccharide of lipopolysaccharide is called O-antigen of bacteria.

A. lipid A
B. specific polysaccharide
C. core polysaccharide
D. outer protein