Question 1

The compound that is an organic base containing chlorine and two phenolic rings,and is used increasingly for wound degerming,neonatal washes,hand scrubbing,and prepping surgical skin sites is

Accepted Answer

A)  carbolic acid.
B)  chlorhexidine.
C)  triclosan.
D)  formalin.
E)  quaternary ammonium compounds.F) A) and E)
G) B) and D)

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

A microorganism that is not motile and has stopped metabolizing is considered dead.

Accepted Answer

A) True 
 B)False

Question 4

Pasteurization

Accepted Answer

A)  kills all vegetative forms.
B)  reduces the number of vegetative forms.
C)  reduces the number of endospores.
D)  increases food nutrient value.
E)  is used to sterilize food products.F) C) and E)
G) D) and E)

Question 5

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

Accepted Answer

A)  virucide
B)  bactericide
C)  germicide
D)  sporicide
E)  fungicideF) B) and E)
G) A) and E)

Question 6

Ionizing radiation is more effective than nonionizing radiation in killing or inactivating microbes.

Accepted Answer

A) True 
 B)False

Question 7

The process that destroys or removes all microorganisms and microbial forms,including bacterial endospores,on inanimate objects is

Accepted Answer

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

Question 8

The minimum sterilizing conditions in a steam autoclave are

Accepted Answer

A)  121 ∘\circ∘ C at 15 psi for 15 minutes.
B)  63 ∘\circ∘ C for 30 minutes.
C)  160 ∘\circ∘ C for 2 hours.
D)  71.6 ∘\circ∘ C for 15 seconds.
E)  100 ∘\circ∘ C for 30 minutes. F) A) and B)
G) C) and D)

Question 9

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Accepted Answer

A) True 
 B)False

Question 10

Your friend Joe recently visited the doctor for steroid injections into his knee to reduce swelling due to previous knee injury.Within a couple of days,he had an infection caused by Pseudomonas,a very pathogenic and drug resistant bacterium.Luckily,Joe went to the doctor immediately and received antibiotics.The doctor tells him that problem has occurred to many other people across the U.S.Predict the most likely cause of this situation:

Accepted Answer

A)  The staff giving the steroid injections did not use proper aseptic technique.
B)  The steroid was contaminated at the production plant,so all batches of that drug made at that plant were contaminated with the bacterium.
C)  The bacterium is normally on the skin of people,so can easily access the patient's blood during the needle stick.
D)  The needles were re-used and already contaminated before being used on the patients.E) A) and C)
F) B) and C) A

Question 11

The shortest time required to kill or inactivate all the microbes in a sample at a specified temperature is called the

Accepted Answer

A)  thermal death point (TDP) .
B)  thermal death time (TDT) .
C)  sporicidal time.
D)  death phase point.E) A) and B)
F) C) and D)

Question 12

_____ solution was introduced in the late 19th century for preventing gonococcal infections in a newborn's eyes after exposure to the mother's infected birth canal.

Accepted Answer

A)  Merthiolate
B)  Triclosan
C)  Betadine
D)  Silver nitrate
E)  Zinc oxideF) B) and E)
G) A) and E)

Question 13

Prions require more extensive methods of sterilization than are needed for bacterial endospores.

Accepted Answer

A) True 
 B)False

Question 14

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is

Accepted Answer

A)  disinfection.
B)  sterilization.
C)  antisepsis.
D)  sanitization.E) B) and C)
F) None of the above

Question 15

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)  mycobacteria and staphylococci.F) A) and C)
G) C) and D) B

Question 16

Antimicrobial agents can target the cell wall by

Accepted Answer

A)  blocking its synthesis.
B)  digesting it.
C)  denaturing proteins.
D)  All of the choices are correct.E) A) and D)
F) All of the above

Question 17

Bacteriostatic agents kill bacterial cells.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is not true of chloramines?

Accepted Answer

A)  contain chlorine
B)  can sanitize and disinfect
C)  form trihalomethanes with organic compounds
D)  are safer than free chlorine
E)  treat wounds and skin surfacesF) B) and E)
G) B) and D)

Question 19

Which of the following is not used as an antiseptic?

Accepted Answer

A)  iodophor
B)  chlorhexidine
C)  3% hydrogen peroxide
D)  merthiolate
E)  aqueous glutaraldehydeF) None of the above
G) All of the above E

Question 20

When a control agent targets the metabolic processes of microbial cells,active younger cells typically die more rapidly than older cells.

Accepted Answer

A) True 
 B)False

Exam 11: Physical and Chemical Control of Microbes

The compound that is an organic base containing chlorine and two phenolic rings,and is used increasingly for wound degerming,neonatal washes,hand scrubbing,and prepping surgical skin sites is

Correct Answer
verified

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

Correct Answer
verified

A microorganism that is not motile and has stopped metabolizing is considered dead.

Correct Answer
verified

Pasteurization

Correct Answer
verified

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

Correct Answer
verified

Ionizing radiation is more effective than nonionizing radiation in killing or inactivating microbes.

Correct Answer
verified

The process that destroys or removes all microorganisms and microbial forms,including bacterial endospores,on inanimate objects is

Correct Answer
verified

The minimum sterilizing conditions in a steam autoclave are

Correct Answer
verified

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Correct Answer
verified

Correct Answer
verified
A

The shortest time required to kill or inactivate all the microbes in a sample at a specified temperature is called the

Correct Answer
verified

_____ solution was introduced in the late 19th century for preventing gonococcal infections in a newborn's eyes after exposure to the mother's infected birth canal.

Correct Answer
verified

Prions require more extensive methods of sterilization than are needed for bacterial endospores.

Correct Answer
verified

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is

Correct Answer
verified

The easiest microbial forms to kill or inhibit are

Correct Answer
verified
B

Antimicrobial agents can target the cell wall by

Correct Answer
verified

Bacteriostatic agents kill bacterial cells.

Correct Answer
verified

Which of the following is not true of chloramines?

Correct Answer
verified

Which of the following is not used as an antiseptic?

Correct Answer
verified
E

When a control agent targets the metabolic processes of microbial cells,active younger cells typically die more rapidly than older cells.

Correct Answer
verified

Exam 11: Physical and Chemical Control of Microbes

The compound that is an organic base containing chlorine and two phenolic rings,and is used increasingly for wound degerming,neonatal washes,hand scrubbing,and prepping surgical skin sites is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A microorganism that is not motile and has stopped metabolizing is considered dead.

Correct AnswerverifiedShow Answer

Pasteurization

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Ionizing radiation is more effective than nonionizing radiation in killing or inactivating microbes.

Correct AnswerverifiedShow Answer

The process that destroys or removes all microorganisms and microbial forms,including bacterial endospores,on inanimate objects is

Correct AnswerverifiedShow Answer

The minimum sterilizing conditions in a steam autoclave are

Correct AnswerverifiedShow Answer

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA

The shortest time required to kill or inactivate all the microbes in a sample at a specified temperature is called the

Correct AnswerverifiedShow Answer

_____ solution was introduced in the late 19th century for preventing gonococcal infections in a newborn's eyes after exposure to the mother's infected birth canal.

Correct AnswerverifiedShow Answer

Prions require more extensive methods of sterilization than are needed for bacterial endospores.

Correct AnswerverifiedShow Answer

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is

Correct AnswerverifiedShow Answer

The easiest microbial forms to kill or inhibit are

Correct AnswerverifiedB

Antimicrobial agents can target the cell wall by

Correct AnswerverifiedShow Answer

Bacteriostatic agents kill bacterial cells.

Correct AnswerverifiedShow Answer

Which of the following is not true of chloramines?

Correct AnswerverifiedShow Answer

Which of the following is not used as an antiseptic?

Correct AnswerverifiedE

When a control agent targets the metabolic processes of microbial cells,active younger cells typically die more rapidly than older cells.

Correct AnswerverifiedShow Answer

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A

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B

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E

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