Waec Model Questions Vol1 2021 Biology Question 13
Practice objective / multiple choice question 13 from the 2021 Waec Model Questions Vol1 Biology examination.
A culture of *Escherichia coli* starts with 5 × 10⁴ cells. During the exponential phase the population doubles every 20 min. After exactly 2 h an antibiotic is added that reduces the growth rate by 30 % (i.e., the doubling time increases by 30 %). Assuming the reduced rate continues, how many cells will be present after a total of 5 h from the start of the culture? Give your answer in scientific notation to two significant figures.
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About This Question
This is Waec Model Questions Vol1 2021 Biology Question 13. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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