⚗️ Biochemical Engineering Solved MCQs with Answers

Practice 513 approved ⚗️ Biochemical Engineering questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

513 solved MCQs

Vortexing in stirred tank reactors can be prevented byAnswer: Both (a) and (b) Which of the following would be best described as an axial flow impeller?Answer: Both (a) and (b) Henry's law relatesAnswer: The partial pressure of oxygen and the saturation concentration of oxygen in the liquid Power number is ratio ofAnswer: Imposed forced to intertial force The volume of liquid (Vₗ)in a cylindrical reactor can be calculated from the liquid height (Hₗ) and tank diameter (Dₜ) using the following equationAnswer: Vₗ=Hₗ x π x Dₜ²/4 Which of the following(s) is/are non-mechanically agitated reactors?Answer: Both (b) and (c) Which of the following best explains the reasons for using axial flow impellers in crystallization and precipitation reactions?Answer: Both (a) and (b) Which of the following will have the highest surface area available for oxygen transfer?Answer: A sparged stirred tank reactor agitated at 400 rpm A flooded impeller will lead to poor oxygen transfer rates becauseAnswer: Bubbles tend to coalesce under the impeller Power consumption by agitation isAnswer: All of these Which of the following impellers will provide radial flow?Answer: All of these When liquid is pumped through cooling coil in a stirred tank reactor to cool. Which of the following is not correct?Answer: Faster cooling rates at a slower rate of pumping The function of the disengagement zone in an airlift fermenter is toAnswer: All of these Stationary phase is described asAnswer: No further increase in the cell population after a maximum value In the accelerated phase, cell starts toAnswer: Increase and the division rate increases to reach a maximum The monod model predicts that the specific growth rateAnswer: Will increase with the concentration of the growth limiting substrate until it reaches a maximum value A mixed fermentation is one, which producesAnswer: Both acid and alcohol The function of a mechanical seal is toAnswer: Both (a) and (b) The phenomenon in which substrates are used in a sequential manner is known asAnswer: Diauxie The dilution rate, D is defined as(where F = volumetric flow rate, Vᵣ = total volume of culture in the reactor and μ specific growth rate)Answer: F/Vᵣ Diauxie isAnswer: The stagewise uptake of nutrients An open system in which the growth rate is maintained by adding a nutrient (present in limiting quantities) at the same rate as that medium containing micro-organisms is removed is calledAnswer: Chemostat In the death phaseAnswer: Nutrients available for the cells are depleted and begin to die The maximum specific growth rate of an organism depends onAnswer: All of these Which of the following is not correct for the Monod model and the Michaelis Menten Model?Answer: The Monod model was derived from an analysis of the mechanism of microbial growth Bubble column reactor hasAnswer: Large height to diameter ratio Why a T-flask used in small-scale cell culture is incubated in a horizontal position?Answer: Both (a) and (b) An open system in which the growth rate is maintained by the removal and addition of media at such a rate as to maintain a constant cell density is called aAnswer: Turbidostat Wash out in steady state fermentation occurs whenAnswer: Dilution rate is higher than the maximum specific growth rate Fermentor should be filled with medium uptoAnswer: 75-80%