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  4. A bacterium divides every 35 minutes. If a culture containing 105 cells per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes?

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Q. A bacterium divides every 35 minutes. If a culture containing 105 cells per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes?

NTA AbhyasNTA Abhyas 2020Cell Cycle and Cell Division

Solution:

The 'n', the time difference is 175/35 = 5 minutes, then, 2n = 25 = 32.
The culture initially had 105 cells/ml, therefore, 32 X 105 cells will be present after 175 minutes.