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Chapter 7
Supplemental Quiz

1.The following data were obtained by standard plate counts during growth of E. coli in a defined medium containing glucose as the carbon source at 37oC while shaking on an orbital platform.  Calculate the number of generations and the mean generation time in log phase.

TIME

BACTERIA

 

TIME

BACTERIA

4:00

1.2 X 103

  

10:00

6.9 X 107

5:00

2.3 X 103

  

11:00

6.1 X 107

6:00

7.2 X 104

  

12:00

5.7 X 106

7:00

6.5 X 105

  

1:00

6.6 X 105

8:00

8.4 X 106

  

2:00

5.5 X 104

9:00

6.2 X 107

  

3:00

2.9 X 103


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