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A broth medium has been inoculated, and microbial numbers will be counted periodically to generate a bacterial growth curve. At 2 hours after inoculation, the culture has progressed through lag phase and is now in log phase. At this point, the population size is 1 million cells. The generation time is 30 minutes. Assuming the continuation of log growth, how many cells would there be at 2 hours of growth in log phase?

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Answer:

16 million

Explanation:

The population at the beginning of the log phase is 1 million cells.

The generation time (doubling time) is 30 min.

In 2 h, there will be four generations.

The population will have doubled four times (2^4 = 16).

There will be 16 million cells.