Physical and Chemical Agents
Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?

Phenol coefficient test
Capacity test
None of these
Minimum inhibitory concentration test

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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 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

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Physical and Chemical Agents
Which of the following describes the effect of ionizing radiation on microbes?

Substantially decreases enzymatic activity, slowing microbial reproduction
Induces electrons and protons to jump out of the molecules of the microbe
Changes the 3-dimensional structure of proteins to a 2-dimen-sional form
None of these

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