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Home Biochemical Engineering Fermentation Kinetics Comments

  • Question
  • The maximum specific growth rate (?m) of an organism in batch culture is equal to slope of a plot of


  • Options
  • A. In [biomass] against time for exponential phase data only
  • B. In [biomass] against time
  • C. biomass against time
  • D. biomass against time for stationary phase data only

  • Correct Answer
  • In [biomass] against time for exponential phase data only 


  • Fermentation Kinetics problems


    Search Results


    • 1. Diauxie is

    • Options
    • A. growth factors
    • B. microbiological die off
    • C. the simultaneous uptake of nutrients
    • D. the stagewise uptake of nutrients
    • Discuss
    • 2. A mixed fermentation is one, which produces

    • Options
    • A. both alcohol and carbon dioxide
    • B. both acid and carbon dioxide
    • C. both acid and alcohol
    • D. several different kinds of acid
    • Discuss
    • 3. Which of the following is an example of a mathematical model?

    • Options
    • A. Volume of cuboid = length x breadth x height
    • B. The Monod Model
    • C. The Michaelis Menten Equation
    • D. All of the above
    • Discuss
    • 4. The dilution rate, D is defined as(where F = volumetric flow rate, VR = total volume of culture in the reactor and ? specific growth rate)

    • Options
    • A. F/VR
    • B. VR/F
    • C. ?/F
    • D. F/?
    • Discuss
    • 5. Biomass concentrations during fermentation is

    • Options
    • A. diluting the samples to optical density less than 0.3
    • B. monitored by controlling the changes in biomass concentrations
    • C. considering that optical density is proportional to the surface area of the biomass in the sample
    • D. all of the above
    • Discuss
    • 6. The phenomenon in which substrates are used in a sequential manner is known as

    • Options
    • A. trans-substrate genesis
    • B. dialism
    • C. diauxie
    • D. multiplicity
    • Discuss
    • 7. 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 a

    • Options
    • A. manostat
    • B. chemostat
    • C. turbidostat
    • D. culturostat
    • Discuss
    • 8. In an airlift bioreactor, the spent gases released from the liquid are called

    • Options
    • A. downcomer
    • B. disengagement zone
    • C. air riser
    • D. flotsam
    • Discuss
    • 9. The function(s) of the draft tube in an airlift bioreactor is

    • Options
    • A. to reduce bubble coalescence
    • B. to improve circulation
    • C. to even out shear conditions throughout the reactor
    • D. all of the above
    • Discuss
    • 10. Bubble column reactor has

    • Options
    • A. large height to diameter ratio
    • B. small height to diameter ratio
    • C. large diameter to height ratio
    • D. small diameter to height ratio
    • Discuss


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