Igcse Model Questions Vol1 2020 Biology Question 25
Practice objective / multiple choice question 25 from the 2020 Igcse Model Questions Vol1 Biology examination.
A bacterial culture starts with \(1\times10^{3}\) cells. Under optimal conditions the generation time is 20 minutes (the population doubles each generation). After exactly 2 hours an antibiotic is added that doubles the generation time to 40 minutes, and this effect is immediate. Assuming the culture continues to grow exponentially with the new generation time, how many cells are present after a total of 5 hours 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 Igcse Model Questions Vol1 2020 Biology Question 25. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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