A Sample of Well Water Is Tested for Its Bacterial

question 3

Multiple Choice

A sample of well water is tested for its bacterial content in a plate count assay.A one-milliliter sample of the water is diluted in a 1:10 dilution series.One milliliter of the fourth dilution tube is plated in a pour plate.After incubation,the plate has 83 colonies,indicating that the original water sample contained

• A)83 cells per milliliter.
• B)830 cells per milliliter.
• C)8,300 cells per milliliter.
• D)83,000 cells per milliliter.
• E)830,000 cells per milliliter.

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