题目内容

The most potent toxin known in nature is ()

A. Plague toxin
B. Anthrax toxin
C. lecithinase
D. botulinum toxin
E. tetanospasmin

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The main hiding site of HSV-1 is ()

A. labial skin
B. pharyngeal lymph node
C. spinal neural ganglia
D. N trigeminus
E. none of above

Virus can be observed through ()

A. light microscope
B. Eletron microscope
C. X-ray diffraction
D. centrifugation
E. filtration

Which structure of bacteria function as organs of adhesion? ()

A. Fimbriae
B. capsule
C. flagella
D. spore
E. metachromatic granules

All of the following are physical conditions required for bacteria growth except ()

A. nutrient material
B. pH
C. temperature
D. atmosphere
E. sunlight