Gce Model Questions Vol1 2019 Biology Question 31
Practice objective / multiple choice question 31 from the 2019 Gce Model Questions Vol1 Biology examination.
A bacterial culture contains \(1.2 \times 10^{6}\) cells at time zero. After 4 h at \(37^{\circ}\text{C}\) the population has increased to \(9.6 \times 10^{8}\) cells. The generation time at this temperature is therefore constant. If the temperature is raised to \(42^{\circ}\text{C}\) the generation time decreases by 20 %. Assuming exponential growth, how many cells will be present after a total of 6 h (the first 4 h at \(37^{\circ}\text{C}\) followed by 2 h at \(42^{\circ}\text{C}\))? Give your answer in scientific notation to two significant figures.
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This is Gce Model Questions Vol1 2019 Biology Question 31. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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