Question 1

Which bacteria ferment lactose in milk,producing acids that curdle the milk?

Accepted Answer

A)   Spirulina
B)   Streptococcus lactis and Lactobacillus
C)   Saccharomyces cerevisiae
D)   Pediococcus
E)   Leuconostoc mesenteroidesF) C) and D)
G) All of the above

Question 2

Which step in wine production involves crushing fruit?

Accepted Answer

A)   Malting
B)   Preparation of must
C)   Aging
D)   Storage
E)   FermentationF) A) and D)
G) C) and E)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

Indicator bacteria for contaminated water are ______.

Accepted Answer

A)   coliforms
B)   staphylococci
C)   all bacteria
D)   ClostridiaE) A) and D)
F) B) and C)

Question 5

The final treatment of sewage before release into the environment is ______.

Accepted Answer

A)   aeration
B)   filtration
C)   skimming
D)   sludge digesting
E)   chlorinationF) A) and E)
G) C) and D)

Question 6

Most cases of food poisoning occur in the home,not restaurants.

Accepted Answer

A) True 
 B)False

Question 7

The first product produced by genetic manipulation and recombinant technology was ______.

Accepted Answer

A)   cortisone
B)   amylase insulin
C)   insulin
D)   penicillinE) B) and C)
F) A) and B)

Question 8

Irradiated food becomes radioactive.

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A)   there is a limit to the amount of product formed since all materials are added to the fermentor at the beginning.
B)   the end product is not as pure as the product made by the continuous feed process.
C)   it is small scale production of a product.
D)   new substrate must be added to the fermentor continuously for the fermentation to continue.E) A) and B)
F) B) and C)

Question 10

Rennin is added to cheese to help preserve it.

Accepted Answer

A) True 
 B)False

Question 11

Sewage treatment processes result in the production of ______,which can be used to make electricity.

Accepted Answer

A)   hydrogen gas
B)   carbohydrates
C)   methane
D)   nitratesE) A) and C)
F) A) and D)

Question 12

All of the following are food-borne pathogens except ______.

Accepted Answer

A)   Salmonella
B)   Lactobacillus acidophilus
C)   Campylobacter jejuni
D)   Clostridium perfringens
E)   Staphylococcus aureusF) B) and E)
G) A) and B)

Question 13

Bacteriophages sprayed on cold cuts are effective against ______.

Accepted Answer

A)   coliforms
B)   Clostridium
C)   Listeria
D)   S. aureus
E)   MycobacteriumF) A) and D)
G) B) and D)

Question 14

In industrial microbiology,microbes growing on inexpensive nutrients are induced to synthesize valuable products such as amino acids,nucleotides,organic acids and vitamins.

Accepted Answer

A) True 
 B)False

Question 15

Which step in making beer involves inoculating the wort with a species of Saccharomyces?

Accepted Answer

A)   Wort boiled with hops
B)   Fermentation
C)   Preparing a mash
D)   Malting
E)   AgingF) A) and C)
G) A) and D)

Question 16

Nitrates and nitrites are used in cured meats to prevent ______.

Accepted Answer

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

Question 17

What is made by fermenting milk with Streptococcus thermophilus and Lactobacillus bulgaricus?

Accepted Answer

A)   Tofu
B)   Yogurt
C)   Cheese
D)   Kefir
E)   Sour creamF) B) and E)
G) All of the above

Question 18

Methane can be produced from agricultural or industrial products by ______.

Accepted Answer

A)   oxidation of nitrogen gas
B)   anaerobic respiration
C)   fermentation
D)   glycolysisE) A) and D)
F) B) and C)

Question 19

You have never seen a jar of jelly contaminated with microbial growth,even though it is used for months at a time.Which is the best explanation?

Accepted Answer

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

Question 20

Primary sewage treatment includes ______.

Accepted Answer

A)   skimming
B)   sludge digesting
C)   chlorination
D)   filtration
E)   aerationF) A) and C)
G) A) and B)

Exam 25: Applied Microbiology and Food and Water Safety

In industrial microbiology,microbes growing on inexpensive nutrients are induced to synthesize valuable products such as amino acids,nucleotides,organic acids and vitamins.

Correct AnswerverifiedShow Answer

Sewage treatment processes result in the production of ______,which can be used to make electricity.

Correct AnswerverifiedShow Answer

You have never seen a jar of jelly contaminated with microbial growth,even though it is used for months at a time.Which is the best explanation?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Nitrates and nitrites are used in cured meats to prevent ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Primary sewage treatment includes ______.

Correct AnswerverifiedShow Answer

Bacteriophages sprayed on cold cuts are effective against ______.

Correct AnswerverifiedShow Answer

Which bacteria ferment lactose in milk,producing acids that curdle the milk?

Correct AnswerverifiedShow Answer

Irradiated food becomes radioactive.

Correct AnswerverifiedShow Answer

What is made by fermenting milk with Streptococcus thermophilus and Lactobacillus bulgaricus?

Correct AnswerverifiedShow Answer

Methane can be produced from agricultural or industrial products by ______.

Correct AnswerverifiedShow Answer

Rennin is added to cheese to help preserve it.

Correct AnswerverifiedShow Answer

The first product produced by genetic manipulation and recombinant technology was ______.

Correct AnswerverifiedShow Answer

All of the following are food-borne pathogens except ______.

Correct AnswerverifiedShow Answer

Indicator bacteria for contaminated water are ______.

Correct AnswerverifiedShow Answer

Most cases of food poisoning occur in the home,not restaurants.

Correct AnswerverifiedShow Answer

Which step in wine production involves crushing fruit?

Correct AnswerverifiedShow Answer

The final treatment of sewage before release into the environment is ______.

Correct AnswerverifiedShow Answer

Which step in making beer involves inoculating the wort with a species of Saccharomyces?

Correct AnswerverifiedShow Answer

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