Physical and Chemical Agents
One drawback to the use of ultraviolet light as a sterilizing agent is its

failure to kill microbes located in the center of an object
failure to kill bacteria
failure to bacterial spores
failure to kill microbes in a closed environment

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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

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