Microbial Growth & Control of Microbial Growth
Physical
Requirements
for Growth
Chemical
Requirements
for Growth
Growth of
Bacterial
Cultures
Control of
Growth
Miscellaneous
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FINAL ROUND
Topic 1: Physical Requirements
$100 Question
How is a Psychrophile different from a
Psychrotroph?
ANSWER
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Topic 1: Physical Requirements
$100 Answer
How is a Psychrophile different from a
Psychrotroph?
A Psychrophile is a microbe that can
grow at 0oC, grows optimally at 15oC, and
usually won’t grow at 25oC.
A Psychrotroph is a microbe that can
grow at 0o C, grows optimally at 20o -30oC,
and usually won’t grow above 40oC.
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Topic 1: Physical Requirements
$200 Question
Which one of the following is most likely to
cause food spoilage in your refrigerator?
a. Psychrophile
b. Thermophile
c. Psychrotroph
d. Mesophile
ANSWER
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Topic 1: Physical Requirements
$200 Answer
Which one of the following is most likely to
cause food spoilage in your refrigerator?
a. Psychrophile
b. Thermophile
c. Psychrotroph (correct answer)
d. Mesophile
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Topic 1: Physical Requirements
$300 Question
What type of organism is Listeria
monocytogenes?
a. Psychrophile
b. Thermophile
c. Psychrotroph
d. Mesophile
ANSWER
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Topic 1: Physical Requirements
$300 Answer
What type of organism is Listeria
monocytogenes?
a. Psychrophile
b. Thermophile
c. Psychrotroph (correct answer)
d. Mesophile
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Topic 1: Physical Requirements
$400 Question
What happens to most cells when they are
exposed to a salt water solution?
A)
Nothing
B)
The cell swells and may undergo
osmotic lysis
C)
The cell immediately divides
D)
The cell undergoes plasmolysis and
ANSWER
shrinks
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Topic 1: Physical Requirements
$400 Answer
What happens to most cells when they are
exposed to a salt water solution?
A)
Nothing
B)
The cell swells and may undergo
osmotic lysis
C)
The cell immediately divides
D)
The cell undergoes plasmolysis and
shrinks (correct answer)
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Topic 1: Physical Requirements
$500 Question
Where might a hyperthermophile live?
a. At the ocean floor
b. In a human body
c. In acid
d. In salt water
ANSWER
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Topic 1: Physical Requirements
$500 Answer
Where might a hyperthermophile live?
a. At the ocean floor (correct answer)
b. In a human body
c. In acid
d. In salt water
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Topic 2: Chemical Requirements
$100 Question
Chemoautotrophs and photoautotrophs
derive their carbon from
a. Carbon dioxide
b. Proteins
c. Lipids
d. Carbohydrates
ANSWER
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Topic 2: Chemical Requirements
$100 Answer
Chemoautotrophs and photoautotrophs
derive their carbon from
a. Carbon dioxide (correct answer)
b. Proteins
c. Lipids
d. Carbohydrates
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Topic 2: Chemical Requirements
$200 Question
Microbial metabolism is responsible for
biogeochemical cycles.
A)
True
B)
False
ANSWER
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Topic 2: Chemical Requirements
$200 Answer
Microbial metabolism is responsible for
biogeochemical cycles.
A)
True (correct answer)
B)
False
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Topic 2: Chemical Requirements
$300 Question
A
B
C
D
E
In which of the above tubes are Facultative
Anaerobes growing?
ANSWER
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Topic 2: Chemical Requirements
$300 Answer
A
B
C
D
E
In which of the above tubes are Facultative
Anaerobes growing?
Correct Answer: B
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Topic 2: Chemical Requirements
$400 Question
All organisms require amino acids to make
proteins. How might amino acids be
acquired?
a. Kreb cycle intermediates
b. Environment
c. Glycolysis intermediates
d. All of the above
ANSWER
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Topic 2: Chemical Requirements
$400 Answer
All organisms require amino acids to make
proteins. How might amino acids be
acquired?
a. Kreb cycle intermediates
b. Environment
c. Glycolysis intermediates
d. All of the above (correct answer)
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Topic 2: Chemical Requirements
$500 Question
Give an example of a biofilm residing
inside the body of an animal.
ANSWER
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Topic 2: Chemical Requirements
$500 Answer
Give an example of a biofilm inside the
body of an animal.
Examples include: digestive systems,
bacterial endocarditis, on teeth
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Topic 3: Growth of Bacterial Cultures
$100 Question
Generation time can best be defined as
a. The length of time it takes for lag
phase
b. The duration of log phase
c. The length of time it takes for a cell
to divide
d. The amount of time it takes the cell
to replicate its chromosome
ANSWER
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Topic 3: Growth of Bacterial Cultures
$100 Answer
Generation time can best be defined as
a. The length of time it takes for lag
phase
b. The duration of log phase
c. The length of time it takes for a cell
to divide (correct answer)
d. The amount of time it takes the cell
to replicate its chromosome
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Topic 3: Growth of Bacterial Cultures
$200 Question
Why can’t obligate anaerobes live in
the presence of oxygen (yes, they
die, but why?)
ANSWER
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Topic 3: Growth of Bacterial Cultures
$200 Answer
Why can’t obligate anaerobes live in the
presence of atmospheric oxygen (yes,
they die, but why?)
Correct answer: Obligate anaerobes do
not produce the enzymes (superoxide
dismutase, catalase, peroxidase)
necessary to neutralize the toxic forms
oxygen takes in the cell
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Topic 3: Growth of Bacterial Cultures
$300 Question
A
B
What is
happening in
cell A?
C
ANSWER
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Topic 3: Growth of Bacterial Cultures
$300 Answer
A
B
What is happening
in cell A?
Correct answer:
C
DNA Replication
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Topic 3: Growth of Bacterial Cultures
$400 Question
Which of the areas in the bacterial growth
curve represent the lag phase?
ANSWER
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Topic 3: Growth of Bacterial Cultures
$400 Answer
Which of the areas in the bacterial growth
curve represent the lag phase?
Correct Answer: 1
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Topic 3: Growth of Bacterial Cultures
$500 Question
Why did the population level off at area 3?
ANSWER
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Topic 3: Growth of Bacterial Cultures
$500 Answer
Why did the population level off at area 3?
Correct answer: An increase in wastes
and decrease in nutrients in an enclosed
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environment.
Topic 4: Control of Microbial Growth
$100 Question
In this graph, an antimicrobial agent was
applied. Was this antimicrobial agent
ANSWER
Bacteriostatic or Bactericidal
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Topic 4: Control of Microbial Growth
$100 Answer
In this graph, an antimicrobial agent was
applied. Was this antimicrobial agent
Bacteriostatic (correct answer)
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Topic 4: Control of Microbial Growth
$200 Question
What will increase the effectiveness of most
antiseptics and disinfectants?
A)
Large number of microbes present
B)
Presence of endospores
C)
Presence of organic matter
D)
Presence of biofilms
ANSWER
E)
None of the above
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Topic 4: Control of Microbial Growth
$200 Answer
What will increase the effectiveness of most
antiseptics and disinfectants?
A)
Large number of microbes present
B)
Presence of endospores
C)
Presence of organic matter
D)
Presence of biofilms
E)
None of the above (correct answer)
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Topic 4: Control of Microbial Growth
$300 Question
What works better- Dry heat or Moist
heat?
ANSWER
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Topic 4: Control of Microbial Growth
$300 Answer
What works better- Dry heat or Moist
heat?
Moist heat (correct answer)
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Topic 4: Control of Microbial Growth
$400 Question
Radiation primarily affects
A)
Plasma membranes
B)
Protein synthesis
C)
DNA
D)
Protein structure
ANSWER
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Topic 4: Control of Microbial Growth
$400 Answer
Radiation primarily affects
A)
Plasma membranes
B)
Protein synthesis
C)
DNA (correct answer)
D)
Protein structure
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Topic 4: Control of Microbial Growth
$500 Question
Pasteurization is the same as complete
sterilization.
A)
True
B)
False
ANSWER
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Topic 4: Control of Microbial Growth
$500 Answer
Pasteurization is the same as complete
sterilization.
A)True
B)False
(correct answer)
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Topic 5: Misc.
$100 Question
What are the building blocks of DNA and
RNA called?
ANSWER
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Topic 5: Misc.
$100 Answer
What are the building blocks of DNA and
RNA called?
Nucleotides (correct answer)
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Topic 5: Misc.
$200 Question
A
Which is the deoxyribose?
B
C
D
ANSWER
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Topic 5: Misc.
$200 Answer
Correct Answer: A
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Topic 5: Misc.
$300 Question
Nitrogen bases can be ‘complimentary’.
What does that mean?
ANSWER
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Topic 5: Misc.
$300 Answer
Nitrogen bases can be ‘complimentary’.
What does that mean?
Correct answer: A only forms weak hydrogen
bonds with T and C only forms weak hydrogen
bonds with G.
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Topic 5: Misc.
$400 Question
A ‘gene’ is a section of DNA that codes for
a functional product, such as…..
ANSWER
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Topic 5: Misc.
$400 Answer
A ‘gene’ is a section of DNA that codes for
a functional product, such as…..
Correct Answer: A protein (primarily)
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Topic 5: Misc.
$500 Question
In the Keepers of the Biosphere video,
relationships between organisms in the
rain forest were examined. Fungi in the
rain forest had a symbiotic relationship
with what organism?
ANSWER
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Topic 5: Misc.
$500 Answer
In the Keepers of the Biosphere video,
relationships between organisms in the
rain forest were examined. Fungi in the
rain forest had a symbiotic relationship
with what organism?
Correct Answer: Ants
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FINAL ROUND Question
An experiment began with 5 cells and
ended with 160 cells. How many
generations did the cells go through?
a. 20
b. 6
c. 4
d. 5
ANSWER
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FINAL ROUND Answer
An experiment began with 5 cells and
ended with 160 cells. How many
generations did the cells go through?
a. 20
b. 6
c. 4
d. 5 (correct answer)
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