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Que. Which of the following is best used for long term storage of microbial samples when carried out properly?
a. Storage in a freezer at -10°C
b. Storage in a freezer at ultra low temperatures (-70°C)
c. Storage in a refrigerator on an agar slant
d. Storage on a petri plate at room temperature
Correct Answer:Storage in a freezer at ultra low temperatures (-70°C)
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