Microbiology Test Banks (Exam III)
correct answers.
which of the following is the best method to sterilize heatable solutions? -
answersmembrane filtration
which of the following best describes the pattern of microbial death? - answersthe cells
in a population die at a constant rate
which of the following chemical gents is used for sterilization - answersethylene oxide
which of the following is used for surgical hand scrubs – answers chlorhexidine
which of the following pairs of terms is mismatched? - answersbacteriostatic-kills
vegetative bacterial cells
the antimicrobial activity of chlorine is due to which of the following - answersthe
formation of hypochlorous acid
which of the following regarding antimicrobial control agents is FALSE? -
answersalcohols effectively inactive nonenveloped viruses by attacking lipids
which of the following does not achieve sterilization - answerspasteurization
which of the following is a limitation of the autoclave - answersit cannot be used with
heat-labile materials
an agent used to reduce the number of bacteria on a toilet would most accurately be
called a (n) - answersdisinfectant
application of heat to living cells can result in all of the following except -
answersdecreased thermal death time
which of the following disinfectants acts by disrupting the plasma membrane -
answersbisphenols
oxidizing agents include all of the following except - answersglutaraldehyde
Disinfection of water is achieved by all of the following EXCEPT - answersperacetic acid
all of the following substances are effective against nonenveloped viruses except -
answersalcohol
which of the following methods is used to preserve food by slowing the metabolic
processes of foodborne microbes - answersfreezing
which concentration of ethanol is the most effective bactericide - answers70 percent
, Microbiology Test Banks (Exam III)
correct answers.
all of the following factors contribute to hospital acquired infections except -
answersnone of the answers is correct; all of theses factors may contribute.
which of the following treatments is the most effective for controlling microbial growth -
answersthey are equivalent treatments
which of the following could be used to sterilize petri plates in a plastic wrapper -
answersgamma radiation
which of the following regarding antimicrobial control agents is false - answersa true
antimicrobial control agent is equally effective against both bacteria and viruses
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
In the figure, the thermal death point for this culture is - answersthe answer cannot be
determined
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
in the figure what is the thermal death time? - answers60 minutes
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
In the figure, the decimal reduction time (D value) for the culture, which is defined as the
time to reduce a population by one log is approximately - answers10 minutes
which of the following results in lethal damage to nucleic acids - answersheat, radiation,
and some chemicals
which of the following pairs is mismatched> - answersalcohols-open wounds
which graph in figure 7.2 best depicts the effect of placing the culture in an autoclave for
15 minutes at time x? - answersgraph b
which graph in 7.2 best depicts the effect of placing the culture at 7 degrees Celsius at
time x? - answersgraph d
correct answers.
which of the following is the best method to sterilize heatable solutions? -
answersmembrane filtration
which of the following best describes the pattern of microbial death? - answersthe cells
in a population die at a constant rate
which of the following chemical gents is used for sterilization - answersethylene oxide
which of the following is used for surgical hand scrubs – answers chlorhexidine
which of the following pairs of terms is mismatched? - answersbacteriostatic-kills
vegetative bacterial cells
the antimicrobial activity of chlorine is due to which of the following - answersthe
formation of hypochlorous acid
which of the following regarding antimicrobial control agents is FALSE? -
answersalcohols effectively inactive nonenveloped viruses by attacking lipids
which of the following does not achieve sterilization - answerspasteurization
which of the following is a limitation of the autoclave - answersit cannot be used with
heat-labile materials
an agent used to reduce the number of bacteria on a toilet would most accurately be
called a (n) - answersdisinfectant
application of heat to living cells can result in all of the following except -
answersdecreased thermal death time
which of the following disinfectants acts by disrupting the plasma membrane -
answersbisphenols
oxidizing agents include all of the following except - answersglutaraldehyde
Disinfection of water is achieved by all of the following EXCEPT - answersperacetic acid
all of the following substances are effective against nonenveloped viruses except -
answersalcohol
which of the following methods is used to preserve food by slowing the metabolic
processes of foodborne microbes - answersfreezing
which concentration of ethanol is the most effective bactericide - answers70 percent
, Microbiology Test Banks (Exam III)
correct answers.
all of the following factors contribute to hospital acquired infections except -
answersnone of the answers is correct; all of theses factors may contribute.
which of the following treatments is the most effective for controlling microbial growth -
answersthey are equivalent treatments
which of the following could be used to sterilize petri plates in a plastic wrapper -
answersgamma radiation
which of the following regarding antimicrobial control agents is false - answersa true
antimicrobial control agent is equally effective against both bacteria and viruses
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
In the figure, the thermal death point for this culture is - answersthe answer cannot be
determined
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
in the figure what is the thermal death time? - answers60 minutes
A suspension of 106 Bacillus cereus endospores was put in a hot-air oven at 170°C.
Plate counts were used to determine the number of endospores surviving at the time
intervals shown.
In the figure, the decimal reduction time (D value) for the culture, which is defined as the
time to reduce a population by one log is approximately - answers10 minutes
which of the following results in lethal damage to nucleic acids - answersheat, radiation,
and some chemicals
which of the following pairs is mismatched> - answersalcohols-open wounds
which graph in figure 7.2 best depicts the effect of placing the culture in an autoclave for
15 minutes at time x? - answersgraph b
which graph in 7.2 best depicts the effect of placing the culture at 7 degrees Celsius at
time x? - answersgraph d
