26 notecards = 7 pages (4 cards per page)
The removal or destruction of ALL forms of microbial life is called
The destruction of vegetative pathogens is called
What treatment is intended to lower microbial counts on eating and drinking utensils to safe public health levels?
The absence of significant contamination is called
Commercial sterilization is a limited heat treatment to destroy
d. Clostridium botulinum endospores.
Which of the following BEST describes the pattern of microbial death?
a. The cells in a population die at a constant rate.
The time it takes to kill a microbial population is
b. proportional to the number of microbes.
Damage to which structure causes cellular components to leak into the surrounding medium?
b. plasma membrane
Which of the following types of bond are NOT important in maintaining the shape of proteins?
a. peptide bonds
Which of the following is NOT a factor that influences the effectiveness of antimicrobial treatments?
c. time of day
To sterilize heat-labile solutions, one should use
c. membrane filtration.
Which method kills microorganisms primarily by the coagulation of proteins (denaturation)?
d. moist heat
The phosphatase test is used to determine whether which one of the following processes was carried out correctly?
Flaming is one of the simplest methods of
b. dry heat sterilization.
The lowest temperature at which all of the microorganisms in a particular liquid suspension will be killed in 10 minutes is called
a. thermal death point.
Sterilization can be achieved by using
d. ethylene oxide.
Which method of evaluating disinfectants is the currently used standard?
a. use-dilution test
Which of the following is used on environmental surfaces, instruments, skin surfaces, and mucous membranes?
Ethanol can be used as an effective bactericide when used at a concentration of
Which of the following is NOT used to preserve foods?
Which of the following is the MOST useful for disinfecting medical instruments?
Which of the following is/are used to mechanically remove microbes through scrubbing?
Which chemical agents cause a disruption of the plasma membrane and denaturation of enzymes?
Which agents cause denaturation of enzymes and other essential proteins?
b. heavy metals
What chemical is used to prevent molds from growing in cheese and soft drinks?
a. sorbic acid
What chemical selectively inhibits certain iron-containing enzymes of Clostridium botulinum?
c. sodium nitrite