20 notecards = 5 pages (4 cards per page)
in practical terms in everyday use, which of the following statements provides the definition of sterilization?
a. eliminates organisms and their spores or endospores
which of the following substances or processes kills microorganisms on laboratory surfaces?
which of the following terms best describes the disinfection of cafeteria plates?
the microbial death rate is used to measure _____________________.
d. all of the above
which of the following statements are true concerning the selection of an antimicrobial agent?
d. all of the above
The endospores of which organism are used as a biological indicator of sterilization?
a. Bacillus stearothermophilus
A company that manufactures an antimicrobial cleaner for kitchen counters claims that its product is effective when used in a 50% water solution. By what means might scientists best verify this statement?
d. in use test
Which of the following items functions most like an autoclave?
d. a pressure cooker
The preservation of beef jerky from microbial growth relies on with method of microbial control?
Which of the following types of radiation is more widely used as an antimicrobial technique?
a. electron beams
Which of the following substances would most effectively inhibit anaerobes?
d. hydrogen peroxide
Which of the following adjectives best describes a surgical procedure that is free of microbial contaminants?
Biosafety level 3 includes ___________
a. a double set of entry doors
a sample of E coli has been subjected to heat for a specific time, and 90% of the cells have been destroyed. Which of the following terms best describes this event?
c. decimal reduction time
Which of the following substances is least toxic to humans
c. hydrogen peroxide
Which of the following chemicals is active against bacterial endospores?
b. ethylene oxide
Which of the following disinfectants acts against cell membranes?
Which of the following disinfectants contains alcohol?
d. a tincture of bromine
Which antimicrobial chemical has been used to sterilize spacecraft?
d. ethylene oxide
Which class of surfactant is most soluble in water?
a. quaternary ammonium compounds