题目内容

Which one is the right order of the tetrapeptide side chain in peptidoglycan of Gram negative cell wall?

A. ala-glu-ala-DAP
B. DAP-ala-glu-ala
C. ala-glu-DAP-ala
D. ala-ala-glu-DAP

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The important part of lipopolysaccharide in outer membrane can act as endotoxin:

A. lipid A
B. specific polysaccharide
C. core polysaccharide
D. all three parts

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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

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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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Which one is the right order of the tetrapeptide side chain in peptidoglycan of Gram negative cell wall?

A. ala-glu-ala-DAP B. DAP-ala-glu-ala C. ala-glu-DAP-ala D. ala-ala-glu-DAP

The important part of lipopolysaccharide in outer membrane can act as endotoxin:

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

Which statement is not right about Gram-positive bacteria?

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

A. ala-glu-ala-DAP
B. DAP-ala-glu-ala
C. ala-glu-DAP-ala
D. ala-ala-glu-DAP