Waec Model Questions Vol1 2020 Biology Question 15
Practice objective / multiple choice question 15 from the 2020 Waec Model Questions Vol1 Biology examination.
A bacterial culture is inoculated with 5 × 10⁶ cells. It undergoes a 2‑hour lag phase (no growth), followed by exponential growth for 6 hours with a generation time of 30 minutes. The culture then enters a stationary phase for 4 hours (no change in cell number) and finally a decline phase lasting 3 hours during which the viable cell count falls by 10 % each hour. What is the number of viable cells present at the end of the 15‑hour period? Express your answer in scientific notation to two significant figures.
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About This Question
This is Waec Model Questions Vol1 2020 Biology Question 15. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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