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 refrigerator on an agar slant Storage in a freezer at -10°C Storage on a petri plate at room temperature Storage in a freezer at ultra low temperatures (-70°C) Storage in a refrigerator on an agar slant Storage in a freezer at -10°C 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 Which of the following describes the effect of ionizing radiation on microbes? 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 Substantially decreases enzymatic activity, slowing microbial reproduction ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents The time required to kill 90% of the microorganisms in a sample at a specific temperature is the F value thermal death point D value decimal reduction time F value thermal death point D value decimal reduction time ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is not a disinfectant containing a heavy metal? Copper sulfate Mercurochrome Chlorine Silver nitrate Copper sulfate Mercurochrome Chlorine Silver nitrate ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as none of these tyndallization autoclaving inspissation none of these tyndallization autoclaving inspissation ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Complete destruction of the microorganisms is commonly known as disinfection sterilization none of these antisepsis disinfection sterilization none of these antisepsis ANSWER DOWNLOAD EXAMIANS APP
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