Physical and Chemical Agents One drawback to the use of ultraviolet light as a sterilizing agent is its failure to bacterial spores failure to kill microbes located in the center of an object failure to kill bacteria failure to kill microbes in a closed environment failure to bacterial spores failure to kill microbes located in the center of an object failure to kill bacteria failure to kill microbes in a closed environment 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? 5 1 50 10 5 1 50 10 ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following describes the effect of ionizing radiation on microbes? Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Substantially decreases enzymatic activity, slowing microbial reproduction Induces electrons and protons to jump out of the molecules of the microbe None of these Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Substantially decreases enzymatic activity, slowing microbial reproduction Induces electrons and protons to jump out of the molecules of the microbe None of these ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following was the first widely used antiseptic and disinfectant? Alcohol Iodine Chlorine Phenol Alcohol Iodine Chlorine Phenol ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which disinfectant would be most effective against Staphylococcus found in a blood spill? Cetylpyridinium chloride Hexachlorophene None of these Phenol Cetylpyridinium chloride Hexachlorophene None of these Phenol ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food? Obligate Aerobe Obligate Anaerobe Mesophile Acidophile Obligate Aerobe Obligate Anaerobe Mesophile Acidophile ANSWER DOWNLOAD EXAMIANS APP
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