Question 1

A common environmental organism that may even grow in certain chemical disinfectants is

Accepted Answer

A) Escherichia coli. 
B) Streptococcus pneumoniae. 
C) Pseudomonas aeruginosa. 
D) enveloped virus. 
A) Escherichia coli. 
B) Streptococcus pneumoniae. 
C) Pseudomonas aeruginosa. 
D) enveloped virus.

Question 2

Lister developed his ideas on prevention of infection during medical procedures after studying the work of

Accepted Answer

A) Koch. 
B) Pasteur. 
C) Jenner. 
D) Fleming. 
A) Koch. 
B) Pasteur. 
C) Jenner. 
D) Fleming.

Question 3

Typical conditions used for sterilization are

Accepted Answer

A) 100$\circ$C for 10 minutes. 
B) 12$\circ$C at 15 psi for 15 minutes. 
C) 80$\circ$C for 15 minutes. 
D) 72$\circ$C for 15 seconds. 
A) 100$\circ$C for 10 minutes. 
B) 12$\circ$C at 15 psi for 15 minutes. 
C) 80$\circ$C for 15 minutes. 
D) 72$\circ$C for 15 seconds.

Question 4

Hydrogen peroxide may be used as a sterilant on living tissue.

Accepted Answer

A) True 
 B)False

Question 5

Prions are easily destroyed by common sterilization procedures.

Accepted Answer

A) True 
 B)False

Question 6

Glutaraldehyde

Accepted Answer

A) is,if given enough time,able to destroy all forms of microbial life. 
B) is very good for use on heat-sensitive medical items. 
C) attacks lipids. 
D) does not affect non-enveloped viruses. 
E) is,if given enough time,able to destroy all forms of microbial life AND is very good for use on heat-sensitive medical items. 
A) is,if given enough time,able to destroy all forms of microbial life. 
B) is very good for use on heat-sensitive medical items. 
C) attacks lipids. 
D) does not affect non-enveloped viruses. 
E) is,if given enough time,able to destroy all forms of microbial life AND is very good for use on heat-sensitive medical items.

Question 7

The most important function of nitrites in processed foods is to

Accepted Answer

A) prevent browning. 
B) inhibit the germination of Clostridium botulinum endospores. 
C) prevent carcinogen formation. 
D) make the food more acidic. 
A) prevent browning. 
B) inhibit the germination of Clostridium botulinum endospores. 
C) prevent carcinogen formation. 
D) make the food more acidic.

Question 8

Cold and freezing are very effective in killing bacteria.

Accepted Answer

A) True 
 B)False

Question 9

Nosocomial infections

Accepted Answer

A) are acquired at various social events. 
B) are acquired while in the hospital. 
C) occur because of a susceptible population and presence of disease-causing organisms. 
D) are acquired at sporting events. 
E) are acquired while in the hospital AND occur because of a susceptible population and presence of disease-causing organisms. 
A) are acquired at various social events. 
B) are acquired while in the hospital. 
C) occur because of a susceptible population and presence of disease-causing organisms. 
D) are acquired at sporting events. 
E) are acquired while in the hospital AND occur because of a susceptible population and presence of disease-causing organisms.

Question 10

Ethylene oxide is gas that

Accepted Answer

A) is very useful for sterilizing heat or moisture-sensitive items. 
B) is potentially carcinogenic. 
C) is used as a 37% aqueous solution. 
D) is effective against all microorganisms except endospores and viruses. 
E) is very useful for sterilizing heat or moisture-sensitive items AND is potentially carcinogenic. 
A) is very useful for sterilizing heat or moisture-sensitive items. 
B) is potentially carcinogenic. 
C) is used as a 37% aqueous solution. 
D) is effective against all microorganisms except endospores and viruses. 
E) is very useful for sterilizing heat or moisture-sensitive items AND is potentially carcinogenic.

Question 11

Boiling is very effective at removing most common waterborne pathogens.

Accepted Answer

A) True 
 B)False

Question 12

Ultraviolet radiation at the bactericidal wavelength destroy bacteria by

Accepted Answer

A) destroying endospores. 
B) damaging nucleic acid. 
C) preventing spore formation. 
D) denaturing proteins. 
A) destroying endospores. 
B) damaging nucleic acid. 
C) preventing spore formation. 
D) denaturing proteins.

Question 13

Alcohols are not reliably effective at destroying

Accepted Answer

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

Question 14

Which is true of iodine?

Accepted Answer

A) It does not readily kill endospores. 
B) It may be used as an antiseptic or as a disinfectant. 
C) It is important to use it at the recommended dilution. 
D) It is usually found as tinctures or iodophors. 
E) All of the choices are true. 
A) It does not readily kill endospores. 
B) It may be used as an antiseptic or as a disinfectant. 
C) It is important to use it at the recommended dilution. 
D) It is usually found as tinctures or iodophors. 
E) All of the choices are true.

Question 15

Microbial death rates may be affected by

Accepted Answer

A) pH. 
B) temperature. 
C) the presence of organics. 
D) All of the choices are correct. 
A) pH. 
B) temperature. 
C) the presence of organics. 
D) All of the choices are correct.

Question 16

Liquid media containing heat-sensitive components would best be sterilized by

Accepted Answer

A) ultraviolet (UV)light at 500 nm. 
B) freezing. 
C) lyophilization. 
D) membrane filtration. 
A) ultraviolet (UV)light at 500 nm. 
B) freezing. 
C) lyophilization. 
D) membrane filtration.

Question 17

Heat treatment is an effective method for sterilization or disinfection of all materials.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

A suffix used to describe a killing action would be

Accepted Answer

A) -static. 
B) -cidal. 
C) -cillin. 
D) -tion. 
A) -static. 
B) -cidal. 
C) -cillin. 
D) -tion.

Question 20

Gamma rays cause biological damage in living systems by

Accepted Answer

A) producing reactive molecules such as superoxide and hydroxyl-free radicals. 
B) causing tiny gravity sinks and black holes to be formed in the substance. 
C) introducing toxins. 
D) making the substance radioactive. 
A) producing reactive molecules such as superoxide and hydroxyl-free radicals. 
B) causing tiny gravity sinks and black holes to be formed in the substance. 
C) introducing toxins. 
D) making the substance radioactive.

Exam 5: Control of Microbial Growth

A common environmental organism that may even grow in certain chemical disinfectants is

Lister developed his ideas on prevention of infection during medical procedures after studying the work of

Typical conditions used for sterilization are

Hydrogen peroxide may be used as a sterilant on living tissue.

Prions are easily destroyed by common sterilization procedures.

Glutaraldehyde

The most important function of nitrites in processed foods is to

Cold and freezing are very effective in killing bacteria.

Nosocomial infections

Ethylene oxide is gas that

Boiling is very effective at removing most common waterborne pathogens.

Ultraviolet radiation at the bactericidal wavelength destroy bacteria by

Alcohols are not reliably effective at destroying

Which is true of iodine?

Microbial death rates may be affected by

Liquid media containing heat-sensitive components would best be sterilized by

Heat treatment is an effective method for sterilization or disinfection of all materials.

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

A suffix used to describe a killing action would be

Gamma rays cause biological damage in living systems by

Humans and the Microbial World

The Molecules of Life

Microscopy and Cell Structure

Dynamics of Prokaryotic Growth

Metabolism: Fueling Cell Growth

The Blueprint of Life, From DNA to Protein

Bacterial Genetics

Biotechnology and Recombinant DNA

Identification and Classification of Prokaryotic Organisms

The Diversity of Prokaryotic Organisms

The Eukaryotic Members of the Microbial World

Viruses, Viroids, and Prions

The Innate Immune Response

The Adaptive Immune Response

Host-Microbe Interactions

Immunologic Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Genitourinary Tract Infections

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