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
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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
Which of the following substances is not a product of bacterial anabolism()
A. Pigment
Bacteriocin
C. Interferon
D. Vitamin
E. none of the above
In the growth of bacteria, the most typical phase of the biological characteristics is ()
A. lag phase
B. Logarithmic phase
C. stationary phase
D. decline phase
E. none of the above
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