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Quiz 3

chapter 13 pool

QuestionAnswer
T or F: HEPA filters are able to filter many airborne virions True
T or F: Autoclaves use moist heat to sterilize materials True
Which of the following actions would be most clearly considered bacteriostatic rather than bactericidal? Placing a bacterial culture in the -80 C freezer
The decimal reduction time (D-value) is how long it takes to kill which percentage of a microbial population? 90%
Which phenolic compound has commonly been added to soap and raises concerns about selection for more antimicrobial-resistant bacteria? Triclosan
_______ is the appropriate method to pasteurize milk for areas where the milk cannot be refrigerated. Ultra-high temperature pasteurization
Which halogen or halogen-containing compound is typically used as a form of topical antisepsis? iodophor
Food items are irradiated using ______ radiation ionizing
T or F: Soaps with no added ingredients are bactericidal False
Contact lens cleaners commonly use which type of chemical agent to control microbial growth? Peroxygen
Which method of microbial control introduces double-strand breaks into DNA? ionizing radiation
Microbial death follows which type of trend? logarithmic
Nisin is an antimicrobial peptide produced by which bacterium? Lactococcus lactis
Which of the following is used to determine if a solution of disinfectant actively used in the clinical setting is contaminated? the in-use test
Autoclaves are designed to kill which of the following heat-resistant microbes? endospores
To sterilize packaged intravenous tubing, which method would not be acceptable? nonionizing radiation
What is argyria? a buildup of silver in the body resulting in blue-gray skin
T or F: X-rays and gamma rays are examples of ionizing radiation and cause the formation of thymine dimers. False
Which of the following are the standard conditions for an autoclave? 121 C, 15 psi, 20 minutes
Which of the following is not an example of a fomite? mosquitoes
T or F: commercial sterilization kills all microbes False
The autoclave uses which of the following mechanism(s) for sterilization? pressure and temperature
_____ is a gaseous alkylating agent used to sterilize objects, like bed mattresses, that cannot be autoclaved Ethylene oxide
Liquid growth media that contain antibiotics should be sterilized using which method? membrane filtration
Many chemical preservatives, such as potassium sorbate, preserve food products in which of the following ways? by altering the pH
For appropriate food storage in refrigerators, the temperature should be set to no higher than which of the following? 7 C
From a clinical perspective, aseptic technique is carried out to do which of the following? prevent contamination in living tissue
Which method of microbial control does not rely on denaturing proteins and/or disrupting the integrity of the cell membrane? lyophilization
Ultraviolet light is an example of which type of radiation? nonionizing radiation
X-rays and gamma rays are examples of which type of radiation? ionizing radiation
HEPA filters are required for which Biological Safety Level (BSL)? BSL 4
Phenolic compounds can be found naturally in which group of organisms? plants
Created by: julie.russell
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