Question 1

Alcohols are not reliably effective at destroying

Accepted Answer

A)  vegetative bacteria AND endospores. 
B)  enveloped viruses AND endospores. 
C)  non-enveloped viruses AND enveloped viruses. 
D)  non-enveloped viruses AND endospores. 
E)  non-enveloped viruses AND vegetative cells 
A)  vegetative bacteria AND endospores. 
B)  enveloped viruses AND endospores. 
C)  non-enveloped viruses AND enveloped viruses. 
D)  non-enveloped viruses AND endospores. 
E)  non-enveloped viruses AND vegetative cells

Question 2

Oxidation of proteins is achieved most readily

Accepted Answer

A)  by moist heat. 
B)  by moist heat under pressure. 
C)  in a hot air oven. 
D)  in the presence of organics. 
E)  in a refrigerator. 
A)  by moist heat. 
B)  by moist heat under pressure. 
C)  in a hot air oven. 
D)  in the presence of organics. 
E)  in a refrigerator.

Question 3

Chemical germicides

Accepted Answer

A)  may react irreversibly with proteins/enzymes. 
B)  may react with cytoplasmic membranes or viral envelopes. 
C)  may be disinfecting or even sterilizing. 
D)  are sensitive to dilution factor, time of contact, and temperature of use. 
E)  All of the answer choices are true. 
A)  may react irreversibly with proteins/enzymes. 
B)  may react with cytoplasmic membranes or viral envelopes. 
C)  may be disinfecting or even sterilizing. 
D)  are sensitive to dilution factor, time of contact, and temperature of use. 
E)  All of the answer choices are true.

Question 4

Pasteurization

Accepted Answer

A)  is the use of heat to sterilize food products. 
B)  is a process that uses intense cold to kill microorganisms on foods. 
C)  is the use of heat to reduce numbers of pathogenic/spoilage bacteria in a food item to a safe level. 
D)  is a process that uses short bursts of radiation to kill microorganisms on foods. 
E)  is a process used to preserve only milk and milk products. 
A)  is the use of heat to sterilize food products. 
B)  is a process that uses intense cold to kill microorganisms on foods. 
C)  is the use of heat to reduce numbers of pathogenic/spoilage bacteria in a food item to a safe level. 
D)  is a process that uses short bursts of radiation to kill microorganisms on foods. 
E)  is a process used to preserve only milk and milk products.

Question 5

Typical conditions used for sterilization are

Accepted Answer

A)  100°C for 10 minutes. 
B)  121°C at 15 psi for 15 minutes. 
C)  80°C for 15 minutes. 
D)  72°C for 15 seconds. 
E)  100°C for 10 seconds. 
A)  100°C for 10 minutes. 
B)  121°C at 15 psi for 15 minutes. 
C)  80°C for 15 minutes. 
D)  72°C for 15 seconds. 
E)  100°C for 10 seconds.

Question 6

Organic acids, such as benzoic acid, are often added to foods to prevent microbial growth.

Accepted Answer

A) True 
 B)False

Question 7

Hand washing with plain soap is very effective in controlling spread of microorganisms because

Accepted Answer

A)  plain soap is bacteriostatic and inhibits bacterial growth. 
B)  it is very effective at the mechanical removal of microorganisms. 
C)  all soaps are virucidal and kill all viruses. 
D)  plain soap is bactericidal and kills all bacteria. 
E)  all soaps are bacteriostatic and kill endospores. 
A)  plain soap is bacteriostatic and inhibits bacterial growth. 
B)  it is very effective at the mechanical removal of microorganisms. 
C)  all soaps are virucidal and kill all viruses. 
D)  plain soap is bactericidal and kills all bacteria. 
E)  all soaps are bacteriostatic and kill endospores.

Question 8

Gamma rays cause biological damage in living systems by

Accepted Answer

A)  producing reactive molecules such as superoxide and hydroxyl-free radicals. 
B)  causing breakdown of ribosomes and peptidoglycan. 
C)  introducing life-threatening toxins. 
D)  making the substance radioactive. 
E)  causing a cell to multiply too fast for its environment. 
A)  producing reactive molecules such as superoxide and hydroxyl-free radicals. 
B)  causing breakdown of ribosomes and peptidoglycan. 
C)  introducing life-threatening toxins. 
D)  making the substance radioactive. 
E)  causing a cell to multiply too fast for its environment.

Question 9

Which of the following is/are not (a) sterilization method(s)?

Accepted Answer

A)  Hot air oven 
B)  Autoclave 
C)  Pasteurization 
D)  Filtration 
E)  Pasteurization AND autoclaving 
A)  Hot air oven 
B)  Autoclave 
C)  Pasteurization 
D)  Filtration 
E)  Pasteurization AND autoclaving

Question 10

Which would be most effective against Pseudomonas?

Accepted Answer

A)  Alcohol 
B)  Radiation 
C)  Quaternary ammonium compounds 
D)  Iodophors 
E)  Hand soap 
A)  Alcohol 
B)  Radiation 
C)  Quaternary ammonium compounds 
D)  Iodophors 
E)  Hand soap

Alcohols are not reliably effective at destroying

Oxidation of proteins is achieved most readily

Chemical germicides

Pasteurization

Typical conditions used for sterilization are

Organic acids, such as benzoic acid, are often added to foods to prevent microbial growth.

Hand washing with plain soap is very effective in controlling spread of microorganisms because

Gamma rays cause biological damage in living systems by

Which of the following is/are not (a) sterilization method(s)?

Which would be most effective against Pseudomonas?

Humans and the Microbial World

The Molecules of Life

Microscopy and Cell Structure

Dynamics of Microbial Growth

Microbial Metabolism: Fueling Cell Growth

The Blueprint of Life, From Dna to Protein

Bacterial Genetics

Biotechnology

Identifying and Classifying Microorganisms

The Diversity of Bacteria and Archaea

The Eukaryotic Members of the Microbial World

Viruses, Viroids, and Prions

The Innate Immune Response

The Adaptive Immune Response

Host-Microbe Interactions

Immunological Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Blood and Lymphatic Infections

Nervous System Infections

Genitourinary Tract Infections

Microbial Ecology

Environmental Microbiology: Treatment of Water, Wastes, and Polluted Habitats

Food Microbiology

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Exam 5: Control of Microbial Growth

Alcohols are not reliably effective at destroying

Oxidation of proteins is achieved most readily

Chemical germicides

Pasteurization

Typical conditions used for sterilization are

Organic acids, such as benzoic acid, are often added to foods to prevent microbial growth.

Hand washing with plain soap is very effective in controlling spread of microorganisms because

Gamma rays cause biological damage in living systems by

Which of the following is/are not (a) sterilization method(s)?

Which would be most effective against Pseudomonas?

Humans and the Microbial World

The Molecules of Life

Microscopy and Cell Structure

Dynamics of Microbial Growth

Microbial Metabolism: Fueling Cell Growth

The Blueprint of Life, From Dna to Protein

Bacterial Genetics

Biotechnology

Identifying and Classifying Microorganisms

The Diversity of Bacteria and Archaea

The Eukaryotic Members of the Microbial World

Viruses, Viroids, and Prions

The Innate Immune Response

The Adaptive Immune Response

Host-Microbe Interactions

Immunological Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Blood and Lymphatic Infections

Nervous System Infections

Genitourinary Tract Infections

Microbial Ecology

Environmental Microbiology: Treatment of Water, Wastes, and Polluted Habitats

Food Microbiology

Filters