超星 - Quiz of lecture 1 - 查题吧

单选题

About structure of peptidoglycan, which two molecules are linked alternately to make long bisaccharide chain?

A. NAM+NAG
B. NAM+DAP
C. DAP+NAG
DAP+LPS

单选题

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

单选题

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

单选题

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

单选题

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.

判断题

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

A. 对
B. 错

判断题

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

A. 对
B. 错

判断题

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

A. 对
B. 错

判断题

lipid A is specifically found in the outer membrane of cell wall of Gram positive bacterium.

A. 对
B. 错

判断题

The periplasmic space is present not only in the cell wall of Gram+ bacteium but also inthe cell wall of Gram - bacterium.

A. 对
B. 错

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