Question

If you start out population of 200 cfu/ml of bacterium that divides every 20 min. What will the population density to be at the end of 2 hours. Assuming the cells are in the log phase of growth

Answer 1

Answer:

According to the question, in a 20 minutes cycle, cells double. In 2 hours i.e 120 minutes there will be 6 cycles of 20 min each. If we start from 10 bacteria, then after 6 cycles of 20 minutes each (2 hours in total), we will have 10x 2^6 cells after 2 hours.

So, the correct answer is '2^6 x 10'.