The antibacterial mechanism of penicillin is ()
A. interference of bacterial protein synthesis
B. inhibition of bacterial nucleic acid metabolism
C. inhibition of bacterial enzyme activity
D. interference peptidoglycan tetrapeptide side chain and pentapeptide cross-linked bridge
E. none of the above
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The bacteriostatic structure with anti-phagocytosis is ()
A. flagellum
B. capsules
C. cell wall
D. pili
E. none of the above
Which one of the following is NOT true about L-bacteria ()
A. Variable shape
B. Gram negative
C. No reversible to normal form
D. Cause chronic infection
E. none of the above
Which one of the following is NOT true about the basic structure of bacteria ()?
A. flagellum
B. cell wall
C. cell membrane
D. cytoplasm
E. none of the above
In the Gram stain procedure, bacteria are exposed to 95% alcohol or to an acetone/alcohol mixture. The purpose of this step is ()
A. To adhere the cells to the slide
B. To retain the purple dye within all the bacteria
C. To disrupt the outer cell membrane so the purple dye can leave the bacteria
D. To facilitate the entry of the purple dye into the gram-negative cells
E. none of the above
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