Question

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

Answer 1

Answer:

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