Question 1

All of the following are examples of heavy metals used as antimicrobial agents except:

Accepted Answer

A) iodine 
B) merthiolate 
C) selenium sulfate 
D) copper sulfate 
A) iodine 
B) merthiolate 
C) selenium sulfate 
D) copper sulfate

Question 2

What is the cheapest and easiest means to prevent the spread of disease?

Accepted Answer

A) Vigorous hand washing 
B) Pasteurizing milk 
C) Filtering air in tuberculosis rooms 
D) Exposing operating rooms to ultraviolet light 
A) Vigorous hand washing 
B) Pasteurizing milk 
C) Filtering air in tuberculosis rooms 
D) Exposing operating rooms to ultraviolet light

Question 3

Foods should not be refrozen because

Accepted Answer

A) they will taste different 
B) cellular damage changes texture, allowing nutrient loss and increased spoilage potential 
C) it prevents the spoilage of foods 
D) all of the above 
A) they will taste different 
B) cellular damage changes texture, allowing nutrient loss and increased spoilage potential 
C) it prevents the spoilage of foods 
D) all of the above

Question 4

All of the following apply to the control of microbial growth except:

Accepted Answer

A) a definite proportion of organisms die within a given time interval. 
B) the fewer organisms present, the shorter the time needed for sterility. 
C) microorganisms differ in their susceptibility to antimicrobial agents. 
D) heat is not considered an antimicrobial agent. 
A) a definite proportion of organisms die within a given time interval. 
B) the fewer organisms present, the shorter the time needed for sterility. 
C) microorganisms differ in their susceptibility to antimicrobial agents. 
D) heat is not considered an antimicrobial agent.

Question 5

Surfactants include all of the following except:

Accepted Answer

A) alcohols 
B) detergents 
C) wetting agents 
D) oxidizing agents 
A) alcohols 
B) detergents 
C) wetting agents 
D) oxidizing agents

Question 6

Which is not used to measure the effectiveness of an antimicrobial agent?

Accepted Answer

A) Filter paper method 
B) Phenol coefficient method 
C) Use-dilution method 
D) Plate count method 
A) Filter paper method 
B) Phenol coefficient method 
C) Use-dilution method 
D) Plate count method

Question 7

Formaldehyde,as an antimicrobial agent,is used to:

Accepted Answer

A) preserve food 
B) disinfect skin and inanimate objects 
C) treat protozoan and fungal infections 
D) inactivate viruses without destroying antigenic properties 
A) preserve food 
B) disinfect skin and inanimate objects 
C) treat protozoan and fungal infections 
D) inactivate viruses without destroying antigenic properties

Question 8

Sterilization is the:

Accepted Answer

A) killing or removal of all microorganisms in a material or an object. 
B) reduction of the number of pathogenic microorganisms in a material or object. 
C) killing or removal of some but not all microorganisms. 
D) disinfection of living tissue. 
A) killing or removal of all microorganisms in a material or an object. 
B) reduction of the number of pathogenic microorganisms in a material or object. 
C) killing or removal of some but not all microorganisms. 
D) disinfection of living tissue.

Question 9

Alcohols:

Accepted Answer

A) oxidize disulfide bonds 
B) dissolve lipids and denature proteins 
C) alter nucleic acids 
D) lower the pH 
A) oxidize disulfide bonds 
B) dissolve lipids and denature proteins 
C) alter nucleic acids 
D) lower the pH

Question 10

Compare the meanings of the following paired terms:
a)disinfectant and antiseptic;
b)bactericidal agent and bacteriostatic agent; and
c)sterilization and disinfection. When is it worthwhile to pay extra for a sanitized item?

Accepted Answer

a)Disinfectants are typically applied to

Question 11

Dyes that are used as antimicrobial agents function by:

Accepted Answer

A) disrupting disulfide bonds. 
B) interfering with replication or blocking cell wall synthesis. 
C) denaturing proteins by mixing with water. 
D) oxidizing cellular components. 
A) disrupting disulfide bonds. 
B) interfering with replication or blocking cell wall synthesis. 
C) denaturing proteins by mixing with water. 
D) oxidizing cellular components.

Question 12

What is a chemical agent that can safely be used externally on living tissue to destroy microorganisms or to inhibit their growth?

Accepted Answer

A) Antiseptic 
B) Disinfectant 
C) Sanitizer 
D) Germicide 
A) Antiseptic 
B) Disinfectant 
C) Sanitizer 
D) Germicide

Question 13

Denaturation of proteins by antimicrobial agents _____.

Accepted Answer

A) prevents viruses from infecting host cells 
B) disrupts hydrogen and disulfide bonds 
C) aids in preserving the shape and function of proteins 
D) two of the above 
A) prevents viruses from infecting host cells 
B) disrupts hydrogen and disulfide bonds 
C) aids in preserving the shape and function of proteins 
D) two of the above

Question 14

All of the following qualities apply to the selection of an ideal antiseptic except:

Accepted Answer

A) fast acting 
B) effective against all infective agents without harming host tissue 
C) no offensive odor 
D) expensive and difficult to obtain and use 
A) fast acting 
B) effective against all infective agents without harming host tissue 
C) no offensive odor 
D) expensive and difficult to obtain and use

Question 15

What chemical group is used to treat spinach before it is packaged for the consumer?

Accepted Answer

A) Heavy metals 
B) Halogens 
C) Alcohols 
D) Phenols 
A) Heavy metals 
B) Halogens 
C) Alcohols 
D) Phenols

Question 16

Lyophilization is:

Accepted Answer

A) freeze-drying 
B) refrigeration 
C) freezing 
D) heat-drying 
A) freeze-drying 
B) refrigeration 
C) freezing 
D) heat-drying

Question 17

All of the following are examples of general types of electromagnetic radiation except:

Accepted Answer

A) ultraviolet light 
B) ionization 
C) microwaves 
D) ultrasonic waves 
A) ultraviolet light 
B) ionization 
C) microwaves 
D) ultrasonic waves

Question 18

Agents are capable of killing microbes rapidly,perhaps killing certain microorganisms but only inhibiting the growth of others is called:

Accepted Answer

A) antiseptics 
B) disinfectants 
C) sanitizers 
D) all of these 
A) antiseptics 
B) disinfectants 
C) sanitizers 
D) all of these

Question 19

Which sterilization technique would you use on pharmaceutical products?

Accepted Answer

A) Autoclaving 
B) Ionizing radiation 
C) Ultrasonic waves 
D) Detergent 
A) Autoclaving 
B) Ionizing radiation 
C) Ultrasonic waves 
D) Detergent

Question 20

When an antimicrobial agent permanently denatures proteins thus preventing renaturation to their native states it is considered:

Accepted Answer

A) bacteriostatic 
B) bactericidal 
C) bacterial lysis 
D) an inhibitor of growth 
A) bacteriostatic 
B) bactericidal 
C) bacterial lysis 
D) an inhibitor of growth

Exam 12: Sterilization and Disinfection

All of the following are examples of heavy metals used as antimicrobial agents except:

What is the cheapest and easiest means to prevent the spread of disease?

Foods should not be refrozen because

All of the following apply to the control of microbial growth except:

Surfactants include all of the following except:

Which is not used to measure the effectiveness of an antimicrobial agent?

Formaldehyde,as an antimicrobial agent,is used to:

Sterilization is the:

Alcohols:

Compare the meanings of the following paired terms: a)disinfectant and antiseptic; b)bactericidal agent and bacteriostatic agent; and c)sterilization and disinfection. When is it worthwhile to pay extra for a sanitized item?

Dyes that are used as antimicrobial agents function by:

What is a chemical agent that can safely be used externally on living tissue to destroy microorganisms or to inhibit their growth?

Denaturation of proteins by antimicrobial agents _____.

All of the following qualities apply to the selection of an ideal antiseptic except:

What chemical group is used to treat spinach before it is packaged for the consumer?

Lyophilization is:

All of the following are examples of general types of electromagnetic radiation except:

Agents are capable of killing microbes rapidly,perhaps killing certain microorganisms but only inhibiting the growth of others is called:

Which sterilization technique would you use on pharmaceutical products?

When an antimicrobial agent permanently denatures proteins thus preventing renaturation to their native states it is considered:

Scope and History of Microbiology

Fundamentals of Chemistry

Microscopy and Staining

Characteristics of Prokaryotic and Eukaryotic Cells

Essential Concepts of Metabolism

Growth and Culturing of Bacteria

Microbial Genetics

Gene Transfer and Genetic Engineering

An Introduction to Taxonomy: the Bacteria

Viruses

Eukaryotic Microorganisms and Parasites

Antimicrobial Therapy

Host-Microbe Relationships and Disease Processes

Epidemiology and Nosocomial Infections

Innate Host Defenses

Immunology I: Basic Principles of Adaptive Immunity and Immunization

Immunology Ii: Immunological Disorders and Tests

Diseases of the Skin and Eyes; Wounds and Bites

Urogenital and Sexually Transmitted Diseases

Diseases of the Respiratory System

Oral and Gastrointestinal Diseases

Cardiovascular, lymphatic and Systemic Disease

Diseases of the Nervous System

Environmental Microbiology

Applied Microbiology

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