Question 1

Nitrates and nitrites are used in cured meats to prevent

Accepted Answer

A)  botulism intoxication.
B)  S.aureus food poisoning.
C)  mold growth.
D)  infection from fruits and nuts.E) A) and D)
F) A) and C)

Question 2

The yeast used in making bread,beer,and wine is

Accepted Answer

A)  Saccharomyces cerevisiae.
B)  Leuconostoc mesenteroides.
C)  Streptococcus lactis.
D)  Propionibacterium.
E)  Spirulina.F) C) and E)
G) C) and D)

Question 3

Which of the following is not a desired outcome from using microbes in bread-making?

Accepted Answer

A)  leavening
B)  giving flavor and odor
C)  producing ethyl alcohol
D)  conditioning the dough to make it workable
E)  helping the dough riseF) A) and B)
G) C) and D)

Question 4

The organism used to make bleu cheese is

Accepted Answer

A)  Penicillium roqueforti.
B)  Leuconostoc mesenteroides.
C)  Streptococcus lactis.
D)  Propionibacterium.
E)  Micrococcus.F) A) and D)
G) C) and D)

Question 5

The difference between water purification and sewage treatment is:

Accepted Answer

A)  the types of microorganisms used for the treatment.
B)  the amount of air pumped into the water for treatment.
C)  whether the water comes out of peoples' house or not.
D)  there is microbial degradation in sewage treatment,but not at all in water purification.E) A) and D)
F) A) and C)

Question 6

A good range of temperature to store food is

Accepted Answer

A)  0 ∘\circ∘  to 50 ∘\circ∘ C.
B)  20 ∘\circ∘ to 80 ∘\circ∘ C.
C)  below 10 ∘\circ∘ C and above 80 ∘\circ∘ C.
D)  below 4 ∘\circ∘ C and above 60 ∘\circ∘ C.
E)  below -10 ∘\circ∘ C and above 100 ∘\circ∘ C. F) A) and B)
G) None of the above

Question 7

All of the following are food-borne pathogens except

Accepted Answer

A)  Salmonella.
B)  Campylobacter jejuni.
C)  Lactobacillus acidophilus.
D)  Clostridium perfringens.
E)  Staphylococcus aureus.F) B) and C)
G) All of the above

Question 8

Secondary metabolites are essential molecules needed by the microorganism.

Accepted Answer

A) True 
 B)False

Question 9

Analysis of a water sample by a series of presumptive,confirmatory,and completed tests that help establish an estimate of coliform numbers in the water is called:

Accepted Answer

A)  membrane filter method.
B)  most probable number (MPN) .
C)  standard plate count.
D)  PCR.E) C) and D)
F) B) and D)

Question 10

Which of the following is not a gas-forming microbe used to make bread?

Accepted Answer

A)  Saccharomyces cerevisiae
B)  Clostridium perfringens
C)  Coliform bacteria
D)  Heterofermentative lactic acid bacteria
E)  Streptococcus lactisF) C) and D)
G) B) and C)

Question 11

Dehydration is an excellent microbicidal method.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is not true of industrial microbiology?

Accepted Answer

A)  Primary metabolites are essential to a microbe's function.
B)  Secondary metabolites include vitamins,antibiotics,and steroids.
C)  Growth environment is enhanced to increase metabolite synthesis.
D)  Select microbial strains are not controlled by feedback mechanisms.E) A) and D)
F) B) and D)

Question 13

Which statement is true regarding pasteurization?

Accepted Answer

A)  It does not kill all microorganisms in milk.
B)  The process was first used in the wine industry.
C)  During pasteurization the heating is done very quickly as to not change the integrity and taste of the product.
D)  All statements are true.E) A) and D)
F) A) and C)

Question 14

The disadvantage of batch fermentations,as opposed to continuous feed systems,is:

Accepted Answer

A)  there has to be new substrate added to the fermentor all of the time for the fermentation to continue.
B)  there is a limit to the amount of product that can be produced since all materials are added to the fermentor at the beginning.
C)  it is small scale production of a product.
D)  the end product is not as pure as the product made by the continuous feed process.E) B) and D)
F) None of the above

Question 15

Methane can be produced from agricultural or industrial products by:

Accepted Answer

A)  anaerobic respiration.
B)  oxidation of nitrogen gas.
C)  fermentation.
D)  glycolysis.E) None of the above
F) A) and B)

Question 16

Place the steps of the water purification process in order.

Accepted Answer

A)  filtration and settling,chemical disinfection,aeration,release into a water reservoir
B)  aeration,filtration and settling,chemical disinfection,release into a water reservoir
C)  chemical disinfection,aeration,filtration and settling,release into a water reservoir
D)  release into a water reservoir,aeration,filtration and settling,chemical disinfectionE) A) and B)
F) All of the above

Question 17

Bacillus thuringiensis

Accepted Answer

A)  causes food poisoning.
B)  produces a biopesticide.
C)  is used in cheese making.
D)  is a microorganism used as food.E) None of the above
F) A) and D)

Question 18

In batch fermentation,substrate is added continuously and the product is siphoned off throughout the run.

Accepted Answer

A) True 
 B)False

Question 19

You have never seen a container of jelly go bad or be contaminated with microbial growth,even though it is continuously used for months at a time.Which is the best explanation?

Accepted Answer

A)  Jelly is pasteurized.
B)  Jelly has a high osmotic pressure.
C)  Jelly is filter sterilized.
D)  A variety of chemicals are added to jelly to make it inhospitable for bacteria.E) A) and D)
F) B) and C)

Question 20

Which step in wine making involves the crushing of the fruit?

Accepted Answer

A)  aging
B)  fermentation
C)  preparation of must
D)  storage
E)  maltingF) B) and E)
G) C) and E)

Exam 25: Applied Microbiology and Food and Water Safety

A good range of temperature to store food is

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The difference between water purification and sewage treatment is:

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You have never seen a container of jelly go bad or be contaminated with microbial growth,even though it is continuously used for months at a time.Which is the best explanation?

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Which of the following is not true of industrial microbiology?

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Which of the following is not a gas-forming microbe used to make bread?

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Secondary metabolites are essential molecules needed by the microorganism.

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Methane can be produced from agricultural or industrial products by:

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Which of the following is not a desired outcome from using microbes in bread-making?

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In batch fermentation,substrate is added continuously and the product is siphoned off throughout the run.

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Bacillus thuringiensis

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Dehydration is an excellent microbicidal method.

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Which statement is true regarding pasteurization?

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Nitrates and nitrites are used in cured meats to prevent

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The organism used to make bleu cheese is

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Which step in wine making involves the crushing of the fruit?

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All of the following are food-borne pathogens except

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Place the steps of the water purification process in order.

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The yeast used in making bread,beer,and wine is

Correct AnswerverifiedShow Answer

Analysis of a water sample by a series of presumptive,confirmatory,and completed tests that help establish an estimate of coliform numbers in the water is called:

Correct AnswerverifiedShow Answer

The disadvantage of batch fermentations,as opposed to continuous feed systems,is:

Correct AnswerverifiedShow Answer

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