甜凉肥纠拿杉陡澎哄菜蛊辱柒
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起止时间:2020-12-31到2021-06-30
更新状态:每5天更新一次
Chapter 1 Overview Test for Introduction
1、 How many times should the bacterium be amplified to be visible under the macroscope ?
A:100times
B:500times
C:1000times
D:10000times
答案: 1000times
Chapter 2 Morphology and Structures of Bacteria Test for Morphology and Structures of Bacteria
1、 Which is the measurement unit of bacteria？
A:nanometer
B:micrometer
C:millimeter
D:centimeter
答案: micrometer
2、 Which is the major chemical component of cellwall of the Gram positive bacteria？
A:peptidoglycan
B:lipopolysaccharide
C:teichoic acid
D:chitin
答案: peptidoglycan
3、 Which structure is related to the motivation of the bacteria？
A:common pilus
B:F-pilus
C:flagella
D:mediator
答案: flagella
4、 Which description about the cell wall of the G(-) bacterium is wrong？
A:the content of peptidoglycan is little
B:lack of the bridege of 5-peptite
C:insensitive to penicilin
D:the content of peptidoglycan is much
答案: the content of peptidoglycan is much
5、 Which is the mechanism of bacterioclasis of antalzyme ?
A:to interfere protein synthesis of bacteria
B:to interfere the DNA replication of the bacteria
C:to damage permeability of the bacteria’s cellular membrane
D:to damage β—1，4 glucosidic bond of peptidoglycan framework
答案: to damage β—1，4 glucosidic bond of peptidoglycan framework
Chapter 3 Physiology of Bacteria Test for Physiology of Bacteria
1、 In which period of the bacteria’s growth cycle is most sensitive to the antibiotics?
A:lag phase
B:logarithmic phase
C:stationary phase
D:decline phase
答案: logarithmic phase
2、 most bacteria growing in the liquid medium appear following phenomenon, except become
A:turbid
B:precipitation
C:pellicle
D:colony
答案: colony
3、 On the solid medium,one bacterium proliferate into one group , which is called
A:colony
B:lawn
C:mycoderm
D:strain
答案: colony
4、 To study biological character of the bacterium ,which phase of its growth cycle should be selected?
A:lag phase
B:logarithmic phase
C:stationary phase
D:decline phase
答案: logarithmic phase
5、 Which of the following is the synthesized metabolites of bacterium
A:indole
B:H2S
C:pyrogen
D:methyl red
答案: pyrogen
Chapter 4 Disinfection and Sterilization Test for Disinfection and Sterilization
1、 Sterilization method of milk, beer etc is ( )
A: autoclave sterilization
B:pasteurization
C:ultraviolet disinfection
D:filtration sterilization
答案: filtration sterilization
2、 The most frequently used method to kill bacterial spore is ( )
A:ultraviolet disinfection
B: broil sterilization
C:fractional sterilization
D: autoclave sterilization
答案: autoclave sterilization
3、 sterilization is ( )
A:to kill all microorganism of object surface
B:to kill pathogenic microorganism of object suface
C:to inhibit growth and breeding of microorganism
D:to kill bacterial vegetative form
答案: to kill all microorganism of object surface
4、 For moist heat sterilization, the best method is ( )
A:autoclave sterilization
B:steam sterilization
C: pasteurization
D:boiling method
答案: autoclave sterilization
5、 In alcohol disinfection, the best concentration is ( )
A:100％
B:95％
C:75％
D:50％
E:30％
答案: 75％
Chapter 5 Genetics of Bacteria Test for Genetics of Bacteria
1、 Which form is transformation ( )
A:genetic substance was transmitted from donor bacterium to receptor bacterium by F pilus
B:genetic substance was transmitted from donor bacterium to receptor bacterium by vector phage
C:Free DNA segment from donor bacterium directly was ingested into receptor bacterium
D: prophage was integrated into bacterial chromosome
答案: Free DNA segment from donor bacterium directly was ingested into receptor bacterium
2、 Which choice is correct description about the character of bacterial plasmid ( )
A: plasmid is extrachromosomal element
B:plasmid is a special DNA sequence in bacterial chromosome
C:Plasmid couldn’t be transmitted between bacterium by pilus
D:Plasmid control all biological functions of bacteria
答案: plasmid is extrachromosomal element
3、 Transduction is ( )
A: to transfer the bacterial chromosome
B:mediated by F pilus
C:mediated by R-plasmid
D:mediated by phage
答案: mediated by phage
4、 Which type of cell is phage invaded ( )
A:human T cell
B:Bacteria cell
C:HBV
D: bird species RBC
答案: Bacteria cell
5、 What is structure of phage ( )
A: a litte peptidoglycan
B:a semipermeable membrane
C:one type of nucleic acid packaged by protein
D:form metachromatic granules in bacterium
答案: one type of nucleic acid packaged by protein
Chapter 6 Pathogenesis of Bacterial Infection and Host Defense Test for Pathogenesis of Bacterial I
1、 Which structure can help bacterium to settle down in host ( )
A:metachromatic granules
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