Question 1

Which organism is used to initiate the fermentation of cabbage to make sauerkraut?

Accepted Answer

A)   Propionibacterium
B)   Spirulina
C)   Saccharomyces cerevisiae
D)   Streptococcus lactis
E)   Leuconostoc mesenteroidesF) A) and B)
G) A) and C)

Question 2

In the secondary phase of water treatment,organic matter undergoes biodegradation by a diverse mix of bacteria,algae,and protozoa.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements regarding coliform bacteria is correct?

Accepted Answer

A)   Coliforms from the human and bovine GI tracts differ, so identifying the specific microbe will indicate the source of contamination.
B)   Petri dishes used to enumerate coliforms are best incubated at 45-48°C.
C)   The presence of Klebsiella is a strong indicator of fecal contamination.
D)   Coliforms derive from the intestinal tract and therefore indicate fecal contamination.E) B) and D)
F) All of the above

Question 4

Biotechnology includes all of the following except

Accepted Answer

A)   using bacterial antifreeze proteins to protect crops from lethal frosts.
B)   using genetically-modified
C)   using bacterial insecticidal proteins as a means to combat mosquitoes as disease vectors.
D)   modifying antibiotics with different chemical functional groups to increase their potency.
E)   coli as a tool to detect cancer.F) A) and D)
G) A) and B)

Question 5

What is the best definition of biotransformation?

Accepted Answer

A)   Oxidation of sugar to carbon dioxide
B)   Use of microorganisms to modify substances not normally used for growth
C)   Production of alcohol from a substrate
D)   Production of a toxin from a nontoxic chemicalE) B) and C)
F) A) and D)

Question 6

Analysis of a water sample by a series of presumptive,confirmatory,and completed tests that provide an estimate of coliform numbers in the water is called the ______.

Accepted Answer

A)   membrane filter method
B)   coliform count
C)   most probable number (MPN) 
D)   standard plate countE) A) and B)
F) A) and C)

Question 7

Which step in making beer involves sprouting and softening the barley to release amylases to act on starch and proteases to digest protein?

Accepted Answer

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

Question 8

A pure or mixed sample of known microbes added to food is a(n) ______.

Accepted Answer

A)   aerator
B)   leavening
C)   flavor inducer
D)   fermenter
E)   starter cultureF) B) and E)
G) C) and E)

Question 9

The source of wild yeasts carried in a biofilm on grapes is the ______.

Accepted Answer

A)   must
B)   bloom
C)   wort
D)   maltE) A) and B)
F) A) and C)

Question 10

A device in which mass cultures are grown,reactions take place,and product develops is a(n) ______.

Accepted Answer

A)   fermentor
B)   activator
C)   incubator
D)   spargerE) A) and C)
F) None of the above

Question 11

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

Accepted Answer

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

Question 12

The study of the practical use of microbes in various industries and technologies is ______.

Accepted Answer

A)   bioremediation
B)   biotechnology
C)   applied microbiology
D)   microbial ecologyE) None of the above
F) A) and D)

Question 13

Which organisms are used to make salt pickles?

Accepted Answer

A)   Propionibacterium and Spirulina
B)   Saccharomyces cerevisiae and Leuconostoc mesenteroides
C)   Streptococcus lactis and Lactobacillus
D)   Pediococcus cerevisiae and Lactobacillus plantarum
E)   Leuconostoc mesenteroides and SpirulinaF) C) and D)
G) A) and D)

Question 14

Potable water must be ______.

Accepted Answer

A)   free of pathogens
B)   absolutely clear
C)   free of all elements
D)   sterileE) All of the above
F) None of the above

Question 15

Which step in making beer involves soaking malt grain,grinding it,and heating with sugar and starch?

Accepted Answer

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

Question 16

Identify the chemical formula missing from the following equation. Yeast + _________ → 2C2H5OH + 2CO2

Accepted Answer

A)   H2O
B)   C5H12O5
C)   O2
D)   C6H12O6
E)   CH3CHOF) B) and E)
G) C) and D)

Question 17

An organism used to make a variety of industrial enzymes by fermentation is ______.

Accepted Answer

A)   Aspergillus
B)   Salmonella
C)   Penicillium
D)   E.coliE) A) and B)
F) A) and C)

Question 18

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

Accepted Answer

A)   Leuconostoc mesenteroides
B)   Propionibacterium
C)   Saccharomyces cerevisiae
D)   Streptococcus lactis
E)   SpirulinaF) B) and E)
G) None of the above

Question 19

You have to determine what method is best to prevent the growth of microorganisms in your company's food,ham roasts.This method should be efficient,have a high kill rate,not change the food integrity or taste for the most part,and not add much in the way of chemicals.What would you choose?

Accepted Answer

A)   Food preservatives
B)   Filtration
C)   Freezing
D)   Gamma radiation
E)   PasteurizationF) A) and C)
G) A) and E)

Question 20

The difference between water purification and sewage treatment is

Accepted Answer

A)   the amount of air pumped into the water for treatment.
B)   there is microbial degradation in sewage treatment, but not in water purification.
C)   the types of microorganisms used for the treatment.
D)   whether the water source is residential or commercial.E) None of the above
F) B) and D)

Exam 25: Applied Microbiology and Food and Water Safety

Which of the following statements regarding coliform bacteria is correct?

Correct AnswerverifiedShow Answer

A pure or mixed sample of known microbes added to food is a(n) ______.

Correct AnswerverifiedShow Answer

Which organism is used to initiate the fermentation of cabbage to make sauerkraut?

Correct AnswerverifiedShow Answer

The difference between water purification and sewage treatment is

Correct AnswerverifiedShow Answer

An organism used to make a variety of industrial enzymes by fermentation is ______.

Correct AnswerverifiedShow Answer

Which step in making beer involves soaking malt grain,grinding it,and heating with sugar and starch?

Correct AnswerverifiedShow Answer

Identify the chemical formula missing from the following equation. Yeast + _________ → 2C2H5OH + 2CO2

Correct AnswerverifiedShow Answer

The study of the practical use of microbes in various industries and technologies is ______.

Correct AnswerverifiedShow Answer

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 provide an estimate of coliform numbers in the water is called the ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which organisms are used to make salt pickles?

Correct AnswerverifiedShow Answer

What is the best definition of biotransformation?

Correct AnswerverifiedShow Answer

Potable water must be ______.

Correct AnswerverifiedShow Answer

In the secondary phase of water treatment,organic matter undergoes biodegradation by a diverse mix of bacteria,algae,and protozoa.

Correct AnswerverifiedShow Answer

Which step in making beer involves sprouting and softening the barley to release amylases to act on starch and proteases to digest protein?

Correct AnswerverifiedShow Answer

A device in which mass cultures are grown,reactions take place,and product develops is a(n) ______.

Correct AnswerverifiedShow Answer

You have to determine what method is best to prevent the growth of microorganisms in your company's food,ham roasts.This method should be efficient,have a high kill rate,not change the food integrity or taste for the most part,and not add much in the way of chemicals.What would you choose?

Correct AnswerverifiedShow Answer

The source of wild yeasts carried in a biofilm on grapes is the ______.

Correct AnswerverifiedShow Answer

Biotechnology includes all of the following except

Correct AnswerverifiedShow Answer

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Identify the chemical formula missing from the following equation. Yeast + _________ → 2C₂H₅OH + 2CO₂

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