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27 March, 08:07

Which of the following correctly describes the use of a dilution factor of 0.01 for dilution of a bacteria culture?

a. Remove 1/100 of the liquid from the original culture.

b. Add 100 ml of water to the original culture.

c. Add 1 mL from the original culture to 100 mlL of water

d. Add 10 mL from the original culture to 990 mL of water

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  1. 27 March, 08:27
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    d. Add 10 mL from the original culture to 990 mL of water

    Explanation:

    Dilution factor is the measure of how much has a sample being diluted. It generally comes up while doing serial dilution.

    Suppose the original culture = 10 ml. If we add 990 ml water to it the total volume will increase to 1000 ml.

    Dilution factor = original sample volume / new sample volume

    Hence here, dilution factor = 10/1000 = 0.01
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