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 mesenteroides

Question 2

You made your first batch (ever)  of wine about 6 weeks ago.You used a new plastic garbage can, covered with plastic wrap over the top, for the process.Now you get a cup of it out of the container only to find no alcohol--just really bad juice.What went wrong?

Accepted Answer

A)  Your yeasts mutated into non-alcohol producing organisms.
B)   The yeasts were not under anaerobic conditions.
C)   The plastic of the container released chemicals that killed the yeasts.
D)   You bought the wrong yeast species at the store.

Question 3

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

Accepted Answer

A)  cortisone
B)   amylase
C)  insulin
D)   penicillin

Question 4

Which of the following is not a step in the mass production of an organic substrate in a fermentor?

Accepted Answer

A)  Remove waste products and dispose responsibly.
B)  Add enzymes to catalyze all required steps in the process.
C)  Inoculate the sterile media in the growth vessel with the microbe of interest.
D)  Adjust the environmental conditions for optimal growth of the organism.
E)  Harvest cells and purify the product.

Question 5

Sewage sludge, the solid that remains after aerobic decomposition, makes a useful fertilizer because

Accepted Answer

A)  it is rich in nitrogen, phosphorus, and potassium.
B)  it contains significant energy in the form of methane.
C)  it has been treated to remove microbes and will not be a source of pathogens.
D)  it is rich in carbon and nitrogen.

Question 6

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 to prevent a change in the integrity and taste of the product.
D)   All statements are true.

Question 7

Preventing the incorporation of microbes into food can by achieved by

Accepted Answer

A)  washing fruits and vegetables.
B)  aseptic techniques for handling meat, eggs, and milk.
C)  handwashing and proper hygiene in the kitchen.
D)  avoiding cross-contamination of utensils and cutting boards.
E)  All of the choices are correct. E

Question 8

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. D

Question 9

The organism used to make bleu cheese is ______.

Accepted Answer

A)  Micrococcus
B)  Penicillium roqueforti
C)  Leuconostoc mesenteroides
D)  Propionibacterium
E)  Streptococcus lactis

Question 10

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 11

Bacteriophages sprayed on cold cuts are effective against ______.

Accepted Answer

A)  coliforms
B)  Clostridium
C)  Listeria
D)  S.aureus
E)  Mycobacterium

Question 12

Secondary metabolites are essential molecules needed by the microorganism.

Accepted Answer

A) True 
 B)False

Question 13

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 ecology

Question 14

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.

Question 15

Which enzyme is used in medicine as a blood thinner?

Accepted Answer

A)  Hemolysin
B)  Protease
C)  Cellulase
D)  Streptokinase
E)  Rennet

Question 16

Industrial microbiology is used in the production of ______.

Accepted Answer

A)  antibiotics
B)  hormones
C)  vitamins
D)  vaccines
E)  All of the choices are correct.

Question 17

Freezing chicken does not kill Salmonella.

Accepted Answer

A) True 
 B)False

Question 18

The first stage in making vinegar involves fermentation by ______.

Accepted Answer

A)  Gluconobacter
B)  Pediococcus
C)  Spirulina
D)  Saccharomyces
E)  Acetobacter D

Question 19

Which step in wine production involves crushing fruit?

Accepted Answer

A)  Malting
B)  Preparation of must
C)  Aging
D)  Storage
E)  Fermentation

Question 20

Which of the following is/are microorganism/s that can be used as food?

Accepted Answer

A)  Spirulina
B)  Methylophilus methylotrophus
C)  Algae
D)  Fusarium graminearum
E)  All of the choices are correct.

Exam 25: Applied Microbiology and Food and Water Safety

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

Correct AnswerverifiedShow Answer

You made your first batch (ever) of wine about 6 weeks ago.You used a new plastic garbage can, covered with plastic wrap over the top, for the process.Now you get a cup of it out of the container only to find no alcohol--just really bad juice.What went wrong?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a step in the mass production of an organic substrate in a fermentor?

Correct AnswerverifiedShow Answer

Sewage sludge, the solid that remains after aerobic decomposition, makes a useful fertilizer because

Correct AnswerverifiedShow Answer

Which statement is true regarding pasteurization?

Correct AnswerverifiedShow Answer

Preventing the incorporation of microbes into food can by achieved by

Correct AnswerverifiedE

Biotechnology includes all of the following except

Correct AnswerverifiedD

The organism used to make bleu cheese is ______.

Correct AnswerverifiedShow Answer

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

Bacteriophages sprayed on cold cuts are effective against ______.

Correct AnswerverifiedShow Answer

Secondary metabolites are essential molecules needed by the microorganism.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which enzyme is used in medicine as a blood thinner?

Correct AnswerverifiedShow Answer

Industrial microbiology is used in the production of ______.

Correct AnswerverifiedShow Answer

Freezing chicken does not kill Salmonella.

Correct AnswerverifiedShow Answer

The first stage in making vinegar involves fermentation by ______.

Correct AnswerverifiedD

Which step in wine production involves crushing fruit?

Correct AnswerverifiedShow Answer

Which of the following is/are microorganism/s that can be used as food?

Correct AnswerverifiedShow Answer

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D

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