Nester's Microbiology Ch 1-4 Multiple choice
1. A method that counts only live microbes is the
A)pure culture method.
B)plate count method.
C)cell counting method.
D)turbidity method.
E)None of these choices are correct.: B)plate count method.
2. Isolating a pure microbial culture from a mixed culture can
be best accomplished
by the
A)broth culture method.
B)streak plate method.
C)membrane filtration method.
D)multi-tube method.
E)None of these choices are correct.: B)streak plate method.
3. The problem with using gelatin as a solidifying agent for
microbiological
media is that
A)many organisms can degrade gelatin.
B)gelatin may not remain solid at temperatures required for
microbial growth.
C)gelatin is not stable during sterilization procedures.
D)gelatin liquefies at warm temperatures.
E)All of these choices are correct: E)All of these choices are
correct
4. A microorganism isolated from the Arctic region would
most likely be
A)a mesophile.
B)facultative.
C)a psychrophile.
D)extremophilic.
E)a psychrotroph.: C)a psychrophile.
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,5. A microorganism that grows in the presence of oxygen
when it is available
but can also grow without oxygen is
A)microaerophilic.
B)aerobic.
C)an aerotolerant anaerobe.
D)a facultative anaerobe.
E)None of these choices are correct.: D)a facultative anaerobe.
6. When organisms use oxygen in aerobic respiration, helpful
derivatives
called reactive oxygen species form as by-products.
A)True
B)False: B)False
7. Organisms that require organic compounds for a carbon
and energy source
are called
A)chemolithoautotrophs.
B)chemoorganoheterotrophs.
C)mesotrophs.
D)psychrotrophs.
E)aerotrophs.: B)chemoorganoheterotrophs.
8. Cobalt, zinc, copper and manganese are examples of
_____________________________.
A)major elements
B)trace elements
C)vital proteins to a cell
D)growth factors
E)None of the above.: B)trace elements
9. An organism is cultured in media containing hydrogen
sulfide and carbon
dioxide as the only sources for energy and carbon. This
would be
A)an enrichment media for chemoorganoheterotrophs.
B)a differential media for chemoorganoheterotrophs.
C)an enrichment media for chemolithoautotrophs.
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, D)a differential medium for photoheterotrophs.
E)None of these choices are correct: C)an enrichment media
for chemolithoautotrophs.
10. Which of the following statements is FALSE?
A)Bacteria growing in log phase are least affected by
antibiotics.
B)The generation time of bacteria may vary from species to
species.
C)Bacteria divide by binary fission, producing two daughter
cells.
D)Secondary metabolites are normally produced during late
log phase.
E)In the lag phase, cells increase the number of ribosomes
they contain.: -
A)Bacteria growing in log phase are least affected by antibiotics.
11. Differential media contain an ingredient that certain
microbes can change
in a recognizable way.
A)True
B)False: A)True
12. When the number of cells in a culture increases
exponentially, the phase
of the culture cycle is termed
A)lag.
B)log.
C)stationary.
D)death.
E)prolonged decline.: B)log.
13. The growth phase in which cells are adapting to new
growth conditions is
termed
A)lag.
B)log.
C)stationary.
D)death.
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1. A method that counts only live microbes is the
A)pure culture method.
B)plate count method.
C)cell counting method.
D)turbidity method.
E)None of these choices are correct.: B)plate count method.
2. Isolating a pure microbial culture from a mixed culture can
be best accomplished
by the
A)broth culture method.
B)streak plate method.
C)membrane filtration method.
D)multi-tube method.
E)None of these choices are correct.: B)streak plate method.
3. The problem with using gelatin as a solidifying agent for
microbiological
media is that
A)many organisms can degrade gelatin.
B)gelatin may not remain solid at temperatures required for
microbial growth.
C)gelatin is not stable during sterilization procedures.
D)gelatin liquefies at warm temperatures.
E)All of these choices are correct: E)All of these choices are
correct
4. A microorganism isolated from the Arctic region would
most likely be
A)a mesophile.
B)facultative.
C)a psychrophile.
D)extremophilic.
E)a psychrotroph.: C)a psychrophile.
1
,5. A microorganism that grows in the presence of oxygen
when it is available
but can also grow without oxygen is
A)microaerophilic.
B)aerobic.
C)an aerotolerant anaerobe.
D)a facultative anaerobe.
E)None of these choices are correct.: D)a facultative anaerobe.
6. When organisms use oxygen in aerobic respiration, helpful
derivatives
called reactive oxygen species form as by-products.
A)True
B)False: B)False
7. Organisms that require organic compounds for a carbon
and energy source
are called
A)chemolithoautotrophs.
B)chemoorganoheterotrophs.
C)mesotrophs.
D)psychrotrophs.
E)aerotrophs.: B)chemoorganoheterotrophs.
8. Cobalt, zinc, copper and manganese are examples of
_____________________________.
A)major elements
B)trace elements
C)vital proteins to a cell
D)growth factors
E)None of the above.: B)trace elements
9. An organism is cultured in media containing hydrogen
sulfide and carbon
dioxide as the only sources for energy and carbon. This
would be
A)an enrichment media for chemoorganoheterotrophs.
B)a differential media for chemoorganoheterotrophs.
C)an enrichment media for chemolithoautotrophs.
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, D)a differential medium for photoheterotrophs.
E)None of these choices are correct: C)an enrichment media
for chemolithoautotrophs.
10. Which of the following statements is FALSE?
A)Bacteria growing in log phase are least affected by
antibiotics.
B)The generation time of bacteria may vary from species to
species.
C)Bacteria divide by binary fission, producing two daughter
cells.
D)Secondary metabolites are normally produced during late
log phase.
E)In the lag phase, cells increase the number of ribosomes
they contain.: -
A)Bacteria growing in log phase are least affected by antibiotics.
11. Differential media contain an ingredient that certain
microbes can change
in a recognizable way.
A)True
B)False: A)True
12. When the number of cells in a culture increases
exponentially, the phase
of the culture cycle is termed
A)lag.
B)log.
C)stationary.
D)death.
E)prolonged decline.: B)log.
13. The growth phase in which cells are adapting to new
growth conditions is
termed
A)lag.
B)log.
C)stationary.
D)death.
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