45. (10 pts) You have a bacterial culture containing 8.4 x 10^8 CFU/ml and you make serial dilutions totaling 10^-7. a. What is the density of bacteria in the 10^-6 dilution tube? b. If you plate 0.1 ml of this 10^-6 dilution, how many colonies would you expect to get on the plate?
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Given: Density of stock culture = 8.4 x 10^8 CFU/ml Dilution factor = 10^-6 Density in the 10^-6 dilution tube = Density of stock culture x Dilution factor Density = 8.4 x 10^8 CFU/ml x 10^-6 Density = 8.4 x 10^2 CFU/ml ** Show more…
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