Question 1

Which is mismatched?

Accepted Answer

A) sodium hypochlorite-chlorine 
B) iodophor-iodine 
C) benzalkoniumchloride-quaternary ammonium compound 
D) chlorhexidine-alcohol 
E) formalin-formaldehyde 
A) sodium hypochlorite-chlorine 
B) iodophor-iodine 
C) benzalkoniumchloride-quaternary ammonium compound 
D) chlorhexidine-alcohol 
E) formalin-formaldehyde

Question 2

Iodophors include

Accepted Answer

A) chloramines. 
B) povidone iodine. 
C) tincture of iodine. 
D) alcohols. 
E) chlorhexidine. 
A) chloramines. 
B) povidone iodine. 
C) tincture of iodine. 
D) alcohols. 
E) chlorhexidine.

Question 3

HEPA filters are used to remove microbes from

Accepted Answer

A) air. 
B) liquids. 
C) human tissues. 
D) medical instruments. 
E) All of these choices are correct. 
A) air. 
B) liquids. 
C) human tissues. 
D) medical instruments. 
E) All of these choices are correct.

Question 4

Which of the following types of control agents would be most likely to achieve sterility?

Accepted Answer

A) virucide 
B) bactericide 
C) germicide 
D) sporicide 
E) fungicide 
A) virucide 
B) bactericide 
C) germicide 
D) sporicide 
E) fungicide

Question 5

Which of the following chemicals is a disinfectant for soft contact lenses?

Accepted Answer

A) hydrogen peroxide 
B) alcohol 
C) hexachlorophene 
D) glutaraldehyde 
E) hypochorites 
A) hydrogen peroxide 
B) alcohol 
C) hexachlorophene 
D) glutaraldehyde 
E) hypochorites

Question 6

Vials of microorganisms that undergo the freeze-drying process called _____ will remain preserved and viable for years.

Accepted Answer

The answer of Vials of microorganisms that undergo the freeze-drying...

Question 7

Physical methods of microbial control will typically sterilize, whereas chemical methods will only disinfect.

Accepted Answer

A) True 
 B)False

Question 8

Which control method would not be a suitable choice for killing Mycobacteria in a capped culture tube?

Accepted Answer

A) ultraviolet (germicidal) light 
B) gamma rays 
C) 121°C at 15 psi for 15 minutes 
D) 160°C for 2 hours 
E) All of these choices are correct. 
A) ultraviolet (germicidal) light 
B) gamma rays 
C) 121°C at 15 psi for 15 minutes 
D) 160°C for 2 hours 
E) All of these choices are correct.

Question 9

Which is correct regarding the rate of microbial death?

Accepted Answer

A) Cells die at increasingly greater rates. 
B) Only older cells die in a culture. 
C) Cells in a culture die at a constant rate. 
D) Upon contact with the control agent, all cells die at one time. 
E) Cells become metabolically inactive but are never killed. 
A) Cells die at increasingly greater rates. 
B) Only older cells die in a culture. 
C) Cells in a culture die at a constant rate. 
D) Upon contact with the control agent, all cells die at one time. 
E) Cells become metabolically inactive but are never killed.

Question 10

Dry heat

Accepted Answer

A) is less efficient than moist heat. 
B) cannot sterilize. 
C) includes tyndallization. 
D) is used in devices called autoclaves. 
E) will sterilize at 121°C for 15 minutes. 
A) is less efficient than moist heat. 
B) cannot sterilize. 
C) includes tyndallization. 
D) is used in devices called autoclaves. 
E) will sterilize at 121°C for 15 minutes.

Question 11

Chlorine compounds remain stable and effective in the presence of excess organic matter.

Accepted Answer

A) True 
 B)False

Question 12

The thermal death point of a strain of Stapylcococcus aureus was determined to be 63°C.How would the the thermal death point of Bacillus subtilis compare?

Accepted Answer

A) The thermal death point of Bacillus subtilis would be just slightly higher than that of Staphylococcus aureus. 
B) The thermal death point of Bacillus subtilis would be significantly higher than that of Staphylococcus aureus. 
C) The thermal death point of Bacillus subtilis would be the same as that of Staphylococcus aureus. 
D) The thermal death point of Bacillus subtilis would be lower that of Staphylococcus aureus. 
A) The thermal death point of Bacillus subtilis would be just slightly higher than that of Staphylococcus aureus. 
B) The thermal death point of Bacillus subtilis would be significantly higher than that of Staphylococcus aureus. 
C) The thermal death point of Bacillus subtilis would be the same as that of Staphylococcus aureus. 
D) The thermal death point of Bacillus subtilis would be lower that of Staphylococcus aureus.

Question 13

The easiest microbial forms to kill or inhibit are

Accepted Answer

A) naked viruses. 
B) vegetative bacteria and fungi. 
C) endospores. 
D) protozoan cysts. 
E) Mycobacterium and Staphylococcus. 
A) naked viruses. 
B) vegetative bacteria and fungi. 
C) endospores. 
D) protozoan cysts. 
E) Mycobacterium and Staphylococcus.

Question 14

__________ or steam sterilization is the process by which steam is heated under pressure to sterilize objects.

Accepted Answer

The answer of __________ or steam sterilization is the process...

Question 15

The use of a physical or chemical process to destroy vegetative pathogens on inanimate objects is

Accepted Answer

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

Question 16

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state, three-dimensional configuration of the proteins.

Accepted Answer

denature;

Question 17

The minimum sterilizing conditions in a steam autoclave are

Accepted Answer

A) 121°C at 15 psi for 15 minutes. 
B) 63°C for 30 minutes. 
C) 160°C for 2 hours. 
D) 71.6°C for 15 seconds. 
E) 100°C for 30 minutes. 
A) 121°C at 15 psi for 15 minutes. 
B) 63°C for 30 minutes. 
C) 160°C for 2 hours. 
D) 71.6°C for 15 seconds. 
E) 100°C for 30 minutes.

Question 18

All of the following are correct about the autoclave, except

Accepted Answer

A) it is important not to overload the chamber. 
B) it is effective for sterilizing powders, oils, and waxy substances. 
C) the duration of the process depends on how full the chamber is. 
D) it is the temperature that kills the microbes, not the pressure by itself. 
E) sterilization is achieved when steam condenses against the objects in the chamber and raises their temperatures. 
A) it is important not to overload the chamber. 
B) it is effective for sterilizing powders, oils, and waxy substances. 
C) the duration of the process depends on how full the chamber is. 
D) it is the temperature that kills the microbes, not the pressure by itself. 
E) sterilization is achieved when steam condenses against the objects in the chamber and raises their temperatures.

Question 19

Alcohols

Accepted Answer

A) denature proteins when in a 50-95% solution. 
B) are used to disinfect items by soaking. 
C) are skin degerming agents. 
D) at 50% or higher concentrations dissolve cell membrane lipids. 
E) All of these choices are correct. 
A) denature proteins when in a 50-95% solution. 
B) are used to disinfect items by soaking. 
C) are skin degerming agents. 
D) at 50% or higher concentrations dissolve cell membrane lipids. 
E) All of these choices are correct.

Question 20

Bacteriostatic agents kill bacterial cells.

Accepted Answer

A) True 
 B)False

Exam 11: Physical and Chemical Agents for Microbial Control

Which is mismatched?

Iodophors include

HEPA filters are used to remove microbes from

Which of the following types of control agents would be most likely to achieve sterility?

Which of the following chemicals is a disinfectant for soft contact lenses?

Vials of microorganisms that undergo the freeze-drying process called _____ will remain preserved and viable for years.

Physical methods of microbial control will typically sterilize, whereas chemical methods will only disinfect.

Which control method would not be a suitable choice for killing Mycobacteria in a capped culture tube?

Which is correct regarding the rate of microbial death?

Dry heat

Chlorine compounds remain stable and effective in the presence of excess organic matter.

The thermal death point of a strain of Stapylcococcus aureus was determined to be 63°C.How would the the thermal death point of Bacillus subtilis compare?

The easiest microbial forms to kill or inhibit are

__________ or steam sterilization is the process by which steam is heated under pressure to sterilize objects.

The use of a physical or chemical process to destroy vegetative pathogens on inanimate objects is

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state, three-dimensional configuration of the proteins.

The minimum sterilizing conditions in a steam autoclave are

All of the following are correct about the autoclave, except

Alcohols

Bacteriostatic agents kill bacterial cells.

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

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