Igcse Model Questions Vol1 2023 Biology Question 7
Practice objective / multiple choice question 7 from the 2023 Igcse Model Questions Vol1 Biology examination.
A bacterial culture at \(37\) °C doubles every \(20\) min. Starting with \(500\) cells, the culture is grown for \(2\) h at this temperature. Then the temperature is raised to \(45\) °C, which shortens the generation time by \(25\%\) (i.e., the new generation time is \(15\) min). However, at \(45\) °C each generation experiences a \(5\%\) loss of cells due to death. Assuming the culture continues for a further \(3\) h at \(45\) °C, how many viable cells are present at the end of the \(5\)-hour period?
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About This Question
This is Igcse Model Questions Vol1 2023 Biology Question 7. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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