Question 1

The disinfectant screening method that is known as the ________ _________ test,which is used to measure the potency of a disinfectant.

Accepted Answer

phenol coefficient

Question 2

An agent that kills bacteria is referred to as __________.

Accepted Answer

bactericidal

Question 3

The higher the phenol coefficient value,the _______ effective the disinfectant under the test conditions.

Accepted Answer

more

Question 4

The disinfecting properties of Lysol,a common household disinfectant,depend upon the presence of __________.

Accepted Answer

The answer of The disinfecting properties of Lysol,a common household...

Question 5

The destruction or removal of all viable organisms is called

Accepted Answer

A) disinfection. 
B) antisepsis. 
C) sterilization. 
D) sanitization. 
A) disinfection. 
B) antisepsis. 
C) sterilization. 
D) sanitization.

Question 6

Which of the following is (are)a sterilizing gas(es)that can be used on heat-sensitive materials?

Accepted Answer

A) Ethylene oxide 
B) Glutaraldehyde 
C) Chlorine gas 
D) Isopropanol 
A) Ethylene oxide 
B) Glutaraldehyde 
C) Chlorine gas 
D) Isopropanol

Question 7

Moist heat sterilization at 100$\circ$C kills all of the following EXCEPT

Accepted Answer

A) bacterial endospores. 
B) fungal spores. 
C) viruses. 
D) bacterial endospores and fungal spores. 
A) bacterial endospores. 
B) fungal spores. 
C) viruses. 
D) bacterial endospores and fungal spores.

Question 8

When antiseptics and disinfectants are compared,antiseptics are generally

Accepted Answer

A) less toxic. 
B) more toxic. 
C) equally as toxic. 
D) unpredictable in toxicity. 
A) less toxic. 
B) more toxic. 
C) equally as toxic. 
D) unpredictable in toxicity.

Question 9

If one left a "pasteurized" flask of broth for a long time at room temperature,it would stay sterile forever,at least in principle.

Accepted Answer

A) True 
 B)False

Question 10

Which will require a longer time to kill?

Accepted Answer

A) a larger population of microorganisms 
B) a smaller population of microorganisms 
C) Killing will be equally as rapid in a large or a small microbial population. 
D) There is no way to predict which will require a longer kill time. 
A) a larger population of microorganisms 
B) a smaller population of microorganisms 
C) Killing will be equally as rapid in a large or a small microbial population. 
D) There is no way to predict which will require a longer kill time.

Question 11

The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is/are advantages of using bacteriophage to treat human bacterial infections?

Accepted Answer

A) Bacteriophage can kill the bacteria. 
B) Bacteriophage will not cause disease or harm humans. 
C) Bacteriophage are very specific for the target bacteria and won't affect normal microbiota. 
D) All of the choices are correct. 
A) Bacteriophage can kill the bacteria. 
B) Bacteriophage will not cause disease or harm humans. 
C) Bacteriophage are very specific for the target bacteria and won't affect normal microbiota. 
D) All of the choices are correct.

Question 13

The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called

Accepted Answer

A) disinfection. 
B) antisepsis. 
C) sterilization. 
D) sanitization. 
A) disinfection. 
B) antisepsis. 
C) sterilization. 
D) sanitization.

Question 14

Although heavy metals are no longer widely used as germicides,__________ is an effective algicide in lakes and swimming pools.

Accepted Answer

A) lead acetate 
B) copper sulfate 
C) silver nitrate 
D) mercuric chloride 
A) lead acetate 
B) copper sulfate 
C) silver nitrate 
D) mercuric chloride

Question 15

Iodine can be complexed with an organic carrier to form water-soluble,stable complexes called __________,which release iodine slowly and eliminate skin burns and irritation associated with iodine use.

Accepted Answer

A) iodides 
B) tinctures 
C) iodophors 
D) iodochromes 
A) iodides 
B) tinctures 
C) iodophors 
D) iodochromes

Question 16

Which of the following would be most effective and practical for routine home disinfection of a toothbrush between uses?

Accepted Answer

A) 70% Isopropyl alcohol 
B) Glutaraldehyde 
C) Bleach 
D) Hydrogen peroxide 
A) 70% Isopropyl alcohol 
B) Glutaraldehyde 
C) Bleach 
D) Hydrogen peroxide

Question 17

A biological safety cabinet filters out more microorganisms than an N95 mask.

Accepted Answer

A) True 
 B)False

Question 18

Gamma radiation

Accepted Answer

A) is a type of nonionizing radiation. 
B) has poor penetrating power. 
C) is used to sterilize some food products. 
D) has a longer wavelength than UV radiation. 
A) is a type of nonionizing radiation. 
B) has poor penetrating power. 
C) is used to sterilize some food products. 
D) has a longer wavelength than UV radiation.

Question 19

Dry heat methods usually require lower temperatures and shorter exposure times than moist heat methods to achieve the same degree of killing because of the drying effects of this form of heat.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following lacks sufficient penetrating power for bulk sterilization?

Accepted Answer

A) Ultraviolet (UV)radiation at 260 nm 
B) X rays 
C) Gamma radiation 
D) Alpha and beta particles 
A) Ultraviolet (UV)radiation at 260 nm 
B) X rays 
C) Gamma radiation 
D) Alpha and beta particles

Exam 8: Control of Microorganisms in the Environment

The disinfectant screening method that is known as the ________ _________ test,which is used to measure the potency of a disinfectant.

An agent that kills bacteria is referred to as __________.

The higher the phenol coefficient value,the _______ effective the disinfectant under the test conditions.

The disinfecting properties of Lysol,a common household disinfectant,depend upon the presence of __________.

The destruction or removal of all viable organisms is called

Which of the following is (are)a sterilizing gas(es)that can be used on heat-sensitive materials?

Moist heat sterilization at 100 ∘\circ∘ C kills all of the following EXCEPT

When antiseptics and disinfectants are compared,antiseptics are generally

If one left a "pasteurized" flask of broth for a long time at room temperature,it would stay sterile forever,at least in principle.

Which will require a longer time to kill?

The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.

Which of the following is/are advantages of using bacteriophage to treat human bacterial infections?

The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called

Although heavy metals are no longer widely used as germicides,__________ is an effective algicide in lakes and swimming pools.

Iodine can be complexed with an organic carrier to form water-soluble,stable complexes called __________,which release iodine slowly and eliminate skin burns and irritation associated with iodine use.

Which of the following would be most effective and practical for routine home disinfection of a toothbrush between uses?

A biological safety cabinet filters out more microorganisms than an N95 mask.

Gamma radiation

Dry heat methods usually require lower temperatures and shorter exposure times than moist heat methods to achieve the same degree of killing because of the drying effects of this form of heat.

Which of the following lacks sufficient penetrating power for bulk sterilization?

The Evolution of Microorganisms and Microbiology

Microscopy

Bacterial Cell Structure

Archaeal Cell Structure

Eukaryotic Cell Structure

Viruses and Other Acellular Infectious Agents

Microbial Growth

Antimicrobial Chemotherapy

Introduction to Metabolism

Catabolism: Energy Release and Conservation

Anabolism: the Use of Energy in Biosynthesis

Bacterial Genome Replication and Expression

Regulation of Bacterial Cellular Processes

Eukaryotic and Archaeal Genome Replication and Expression

Mechanisms of Genetic Variation

Recombinant DNA Technology

Microbial Genomics

Microbial Taxonomy and the Evolution of Diversity

Archaea

The Deinococci, Mollicutes, and Nonproteobacterial Gram-Negative Bacteria

The Proteobacteria

Firmicutes: The Low G-C Gram-Positive Bacteria

Actinobacteria: the High G-C Gram-Positive Bacteria

Protists

Fungi Eumycota

Viruses

Biogeochemical Cycling and Global Climate Change

Methods in Microbial Ecology

Microorganisms in Marine and Freshwater Ecosystems

Microorganisms in Terrestrial Ecosystems

Microbial Interactions

Innate Host Resistance

Adaptive Immunity

Pathogenicity and Infection

Clinical Microbiology and Immunology

Epidemiology and Public Health Microbiology

Human Diseases Caused by Viruses and Prions

Human Diseases Caused by Bacteria

Human Diseases Caused by Fungi and Protists

Microbiology of Food

Biotechnology and Industrial Microbiology

Applied Environmental Microbiology

Filters

The disinfectant screening method that is known as the _ test,which is used to measure the potency of a disinfectant.

Moist heat sterilization at 100^$\circ$C kills all of the following EXCEPT