Physical and Chemical Agents Which of the following describes the effect of ionizing radiation on microbes? Substantially decreases enzymatic activity, slowing microbial reproduction None of these Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Induces electrons and protons to jump out of the molecules of the microbe Substantially decreases enzymatic activity, slowing microbial reproduction None of these Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Induces electrons and protons to jump out of the molecules of the microbe ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have insufficient nutrients toxic alkaline chemicals high concentration of solutes low pH insufficient nutrients toxic alkaline chemicals high concentration of solutes low pH ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Preservation of foods by using salts and sugars works by raising pH creating a hypertonic environment lowering osmotic pressure creating a hypotonic environment raising pH creating a hypertonic environment lowering osmotic pressure creating a hypotonic environment ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is bactericidal? Ionizing radiation Deep freezing Membrane filtration Freeze-drying Ionizing radiation Deep freezing Membrane filtration Freeze-drying ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is most effective for sterilizing mattresses and plastic petri plates? Ultraviolet radiation Chlorine Ethylene oxide Glutaraldehyde Ultraviolet radiation Chlorine Ethylene oxide Glutaraldehyde ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which is the most important surface active disinfectants? Cationic compounds Non-ionic compounds Anionic compounds Amphoteric compounds Cationic compounds Non-ionic compounds Anionic compounds Amphoteric compounds ANSWER DOWNLOAD EXAMIANS APP
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