1.

 

 

 

 

 

 

 

2.

 

 

 

 

        

 

 

3. Culture C has a titer of 1.5 X 10⁸ bacteria/mL.  Draw a dilution scheme showing 1 method in which this culture could be diluted to give plates with between 30 and 300 colonies.

 

 

 

 

 

 

 

 

           

 

 

 

 

 

 

 

 

 

            5.

 

 

 

6. A student performs a dilution on culture F.  She finds that the plating factor is 10⁸ and the average number of colonies per plate is 45.  What is the titer of the stock culture?

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