Physical and Chemical Agents Which of the following describes the effect of ionizing radiation on microbes? None of these Induces electrons and protons to jump out of the molecules of the microbe Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Substantially decreases enzymatic activity, slowing microbial reproduction None of these Induces electrons and protons to jump out of the molecules of the microbe Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Substantially decreases enzymatic activity, slowing microbial reproduction ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which is the most important surface active disinfectants? Amphoteric compounds Non-ionic compounds Anionic compounds Cationic compounds Amphoteric compounds Non-ionic compounds Anionic compounds Cationic compounds ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Media containing spores and thermolabile constituents are sterilized by UV radiation tyndalization dry heat pasteurization UV radiation tyndalization dry heat pasteurization 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 ultra low temperatures (-70°C) Storage on a petri plate at room temperature Storage in a freezer at -10°C Storage in a refrigerator on an agar slant Storage in a freezer at ultra low temperatures (-70°C) Storage on a petri plate at room temperature Storage in a freezer at -10°C Storage in a refrigerator on an agar slant ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is a limitation of the autoclave? It takes too long to sterilize It will destroy heat labile materials It lacks the ability to kill endospores It lacks the ability to inactivate viruses It takes too long to sterilize It will destroy heat labile materials It lacks the ability to kill endospores It lacks the ability to inactivate viruses ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is bactericidal? Freeze-drying Membrane filtration Deep freezing Ionizing radiation Freeze-drying Membrane filtration Deep freezing Ionizing radiation ANSWER DOWNLOAD EXAMIANS APP
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