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Question: Answered & Verified by Expert
A bacterium divides every 35 minutes. If a culture containing 105 cells/ml is grown for 2 hours 55 minutes, what will be the cell concentration per ml?
BiologyBiological ClassificationNEET
Options:
  • A 32 × 105 cells
  • B 35 × 105 cells
  • C 64 × 105 cells
  • D 5 × 105 cells
Solution:
1665 Upvotes Verified Answer
The correct answer is: 32 × 105 cells
The bacterium divides after every 35 minutes through simple mitotic division. The duration of cell division allowed is 2 hours 55 minutes (175 minutes). Therefore, the number of divisions are 17535=5

Since one bacterium on division produces two cells, the cell concentration after 175 minutes will be

=105×(2)5=32×105

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