Physical and Chemical Agents Media containing spores and thermolabile constituents are sterilized by UV radiation pasteurization tyndalization dry heat UV radiation pasteurization tyndalization dry heat ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following methods will not sterilize? 121°C at 15 lb/in pressure for 15 to 20 minutes Dry heat at 171°C for 1 to 2 hours 100°C boiling water for 30 minutes Aqueous glutaraldehyde for 10 hours 121°C at 15 lb/in pressure for 15 to 20 minutes Dry heat at 171°C for 1 to 2 hours 100°C boiling water for 30 minutes Aqueous glutaraldehyde for 10 hours ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is best used for long term storage of microbial samples when carried out properly? Storage in a freezer at -10°C Storage in a refrigerator on an agar slant Storage on a petri plate at room temperature Storage in a freezer at ultra low temperatures (-70°C) Storage in a freezer at -10°C Storage in a refrigerator on an agar slant Storage on a petri plate at room temperature Storage in a freezer at ultra low temperatures (-70°C) ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have low pH high concentration of solutes toxic alkaline chemicals insufficient nutrients low pH high concentration of solutes toxic alkaline chemicals insufficient nutrients ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound? 10 5 1 50 10 5 1 50 ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues. disinfectant sanitizer bacteriostatic agent antiseptic disinfectant sanitizer bacteriostatic agent antiseptic ANSWER DOWNLOAD EXAMIANS APP
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