Physical and Chemical Agents Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have toxic alkaline chemicals high concentration of solutes low pH insufficient nutrients toxic alkaline chemicals high concentration of solutes low pH insufficient nutrients ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is bactericidal? Membrane filtration Deep freezing Freeze-drying Ionizing radiation Membrane filtration Deep freezing Freeze-drying Ionizing radiation ANSWER DOWNLOAD EXAMIANS APP
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 Preservation of foods by using salts and sugars works by creating a hypertonic environment raising pH lowering osmotic pressure creating a hypotonic environment creating a hypertonic environment raising pH lowering osmotic pressure creating a hypotonic environment ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Bactericidal concentration of phenol is 0.5% 1% 0.25% 0.75% 0.5% 1% 0.25% 0.75% ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is not a disinfectant containing a heavy metal? Silver nitrate Copper sulfate Chlorine Mercurochrome Silver nitrate Copper sulfate Chlorine Mercurochrome ANSWER DOWNLOAD EXAMIANS APP
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