PRESCOTS MICROBIOLOGY CH 8 CORRECT
DETAILED ANSWERS (BRAND NEW).
Which of the following lacks sufficient penetrating power for bulk
sterilization? - CORRECT ANSWER -Ultraviolet (UV) radiation at 260 nm
Moist heat sterilization at 1000 kills all of the following EXCEPT - CORRECT
ANSWER -bacterial endospores.
Gamma radiation - CORRECT ANSWER -is used to sterilize some food products.
Moist heat sterilizes by - CORRECT ANSWER -denaturing proteins.
Which of the following is true about membrane filters? - CORRECT ANSWER -It
can't be depended on to remove all viruses from liquids.
When comparing dry heat and moist heat sterilization, dry heat is - CORRECT
ANSWER -slower.
The first product to be commercially treated by pasteurization was -
CORRECT ANSWER -wine
Pasteurization is used to - CORRECT ANSWER -kill any pathogens present and
retard spoilage.
, Which kind of sterilization procedure takes advantage of the size of
microorganisms? - CORRECT ANSWER -Filtration
Ultraviolet radiation is an effective means of sterilizing surfaces. - CORRECT
ANSWER -True
If one left a "pasteurized" flask of broth for a long time at room
temperature, it would stay sterile forever, at least in principle. - CORRECT
ANSWER -False
The type of filter used in a laminar flow biological safety cabinet is called
a(n) __________ filter. - CORRECT ANSWER -HEPA (high efficiency
particulate air)
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. - CORRECT ANSWER -False
Because filtration removes rather than destroys microorganisms, it does
not truly sterilize the materials passing through the filter. - CORRECT ANSWER
-False
Which of the following is a function of pasteurization? - CORRECT ANSWER -
All of the choices are correct.
Which of these is an agent that is used to sterilize the plastic tubing of
heart-lung machines? - CORRECT ANSWER -Ethylene oxide
DETAILED ANSWERS (BRAND NEW).
Which of the following lacks sufficient penetrating power for bulk
sterilization? - CORRECT ANSWER -Ultraviolet (UV) radiation at 260 nm
Moist heat sterilization at 1000 kills all of the following EXCEPT - CORRECT
ANSWER -bacterial endospores.
Gamma radiation - CORRECT ANSWER -is used to sterilize some food products.
Moist heat sterilizes by - CORRECT ANSWER -denaturing proteins.
Which of the following is true about membrane filters? - CORRECT ANSWER -It
can't be depended on to remove all viruses from liquids.
When comparing dry heat and moist heat sterilization, dry heat is - CORRECT
ANSWER -slower.
The first product to be commercially treated by pasteurization was -
CORRECT ANSWER -wine
Pasteurization is used to - CORRECT ANSWER -kill any pathogens present and
retard spoilage.
, Which kind of sterilization procedure takes advantage of the size of
microorganisms? - CORRECT ANSWER -Filtration
Ultraviolet radiation is an effective means of sterilizing surfaces. - CORRECT
ANSWER -True
If one left a "pasteurized" flask of broth for a long time at room
temperature, it would stay sterile forever, at least in principle. - CORRECT
ANSWER -False
The type of filter used in a laminar flow biological safety cabinet is called
a(n) __________ filter. - CORRECT ANSWER -HEPA (high efficiency
particulate air)
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. - CORRECT ANSWER -False
Because filtration removes rather than destroys microorganisms, it does
not truly sterilize the materials passing through the filter. - CORRECT ANSWER
-False
Which of the following is a function of pasteurization? - CORRECT ANSWER -
All of the choices are correct.
Which of these is an agent that is used to sterilize the plastic tubing of
heart-lung machines? - CORRECT ANSWER -Ethylene oxide
