Neco 2021 Biology Question 1
Practice objective / multiple choice question 1 from the 2021 Neco Biology examination.
A batch fermenter is used to grow *Bacillus subtilis*. At 30 °C the specific growth rate is \( \mu = 0.45\ \text{h}^{-1} \) and the maintenance coefficient is \( m = 0.02\ \text{h}^{-1} \). When the temperature is raised to 37 °C, \( \mu \) increases by 20 % while \( m \) rises to \(0.03\ \text{h}^{-1}\). The culture starts with a biomass concentration of \(0.5\ \text{g\ L}^{-1}\). It is grown for 8 h at 30 °C and then the temperature is shifted to 37 °C for a further 4 h (total 12 h). Assuming exponential growth with net specific rate \( \mu_{\text{net}} = \mu - m \) in each phase, calculate the final biomass concentration (in g\,L\(^{-1}\)).
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About This Question
This is Neco 2021 Biology Question 1. It is one of the objective questions from the 2021 Neco Biology examination.
Difficulty level: Hard .
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