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起止时间:2021-09-14到2021-11-30
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1.Chapter3 Phage 1.First week test
1、 Which of the following belongs to eukaryotic microorganism?
A:Bacteria
B:Virus
C:Chlamydia
D:Actinomycetes
E:Fungi
答案: Fungi
2、 The unique component of the cell wall of Gram-positive bacteria is:
A:Peptidoglycan
B:Chitin
C:Cholesterol
D:Teichoic acid
E:Lipopolysaccharide
答案: Teichoic acid
3、 The main component of endotoxin is:
A:peptidoglycan
B: protein
C: flagella
D:nucleic acid
E:lipopolysaccharide
答案: lipopolysaccharide
4、 L-type bacteria refer to:
A:Bacteria in dormant state
B:Bacteria with cell wall defects
C:Non-pathogenic bacteria
D:Bacteria with irreversible variation
E:Smooth and rough colony variation
答案: Bacteria with cell wall defects
5、 Which of the following descriptions about spores is correct?
A:Spores can only be formed outside the body.
B:It is a special form of bacteria to maintain life.
C:The bacteria forming spores are G + bacteria.
D:Once the spores pollute the environment, it can cause difficulty in disinfection and sterilization.
E:All of the above are correct.
答案: All of the above are correct.
6、 Which of the following descriptions is wrong about plasmid?
A: It is indispensable gene for the bacteria.
B: It is genetic material outside the chromosome of bacteria.
C: It has the characteristics of self-replication and transmission to next generations.
D:It can be transferred from one bacterium to another.
E:It can be lost by itself.
答案: It is indispensable gene for the bacteria.
7、 What is wrong about pili?
A:Commonly seen in G-bacteria.
B:It is the motor organ of bacteria.
C:Can be divided into common pili and sexual pili.
D:Common pili is related to bacterial adhesion.
E:Sexual pili can transfer genetic materials.
答案: It is the motor organ of bacteria.
8、 In bacterial growth, biological traits are most typical in
A: lag phase
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