Question

multiple choice question
the usual temperatures used in the laboratory to propagate microorganisms are between ______.

○ 30°c and 50°c

○ 10°c and 20°c

○ 20°c and 45°c

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Explanation:

In microbiology (a subfield of Biology, which is part of Natural Science), the typical temperature range for propagating most microorganisms in the laboratory is around \(20^\circ\text{C}\) to \(45^\circ\text{C}\). The range \(10^\circ\text{C}-20^\circ\text{C}\) is too cool for many common microbes, and \(30^\circ\text{C}-50^\circ\text{C}\) is a bit narrow or too high for general propagation (though some thermophiles might use higher, but the usual range is broader and centered around \(20 - 45^\circ\text{C}\)).

Answer:

C. \(20^\circ\text{C}\) and \(45^\circ\text{C}\) (assuming the options are labeled A, B, C as \(30^\circ\text{C}\) and \(50^\circ\text{C}\), \(10^\circ\text{C}\) and \(20^\circ\text{C}\), \(20^\circ\text{C}\) and \(45^\circ\text{C}\) respectively)