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Home Biochemical Engineering Fermentation Kinetics See What Others Are Saying!
  • Question
  • The specific growth rate is affected by


  • Options
  • A. sabstrate concentration
  • B. product concentration
  • C. oxygen supply
  • D. all of these

  • Correct Answer
  • all of these 


  • More questions

    • 1. Wash out in steady state fermentation occurs when

    • Options
    • A. dilution rate is less than maximum specific growth rate
    • B. dilution rate is higher than the maximum specific growth rate
    • C. cell concentration reaches the maximum
    • D. specific growth rate is maximum
    • Discuss
    • 2. The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?

    • Options
    • A. Greater than 20 g dry weight per litre
    • B. Approximately 20 g dry weight per litre
    • C. Lesser than 20 g dry weight per litre
    • D. More than 30 g dry weight per litre
    • Discuss
    • 3. Immobilized cell reactors for wastewater treatment have the advantage of having/being

    • Options
    • A. higher cell concentration
    • B. more stable and prevent washout
    • C. higher dilution rate before the cells washout
    • D. all of the above
    • Discuss
    • 4. The viscosity of a fluid increases with the length of time that it is being mixed. This fluid would be best described as being

    • Options
    • A. newtonian
    • B. rheopectic
    • C. viscoelastic
    • D. thixotropic
    • Discuss
    • 5. Which of the following metallic ion is there in ascorbic acid oxidase?

    • Options
    • A. Mg
    • B. Fe
    • C. Cu
    • D. Mn
    • Discuss
    • 6. The collection efficiency by impaction increases with

    • Options
    • A. increasing particle diameter
    • B. increasing air flow velocity
    • C. both (a) and (b)
    • D. increasing particle size
    • Discuss
    • 7. The specific death rate of an organism can be expressed as

    • Options
    • A. ln 2/D
    • B. D/ln2
    • C. D.ln2
    • D. 2.0.3/ln2
    • Discuss
    • 8. Bioreactors, where vortex is formed, another dimensionless number, __________ is useful.

    • Options
    • A. Stanton
    • B. Rayleigh
    • C. Bond
    • D. Froude
    • Discuss
    • 9. Which of the following is considered as a disadvantage to the adsorption method of immobilization?

    • Options
    • A. It is possible to separate and purify the enzymes while being immobilized
    • B. The enzymes are not usually deactivated by adsorption
    • C. The adsorption is a reversible process
    • D. State of immobilization is very sensitive to solution pH, ionic strength and temperature
    • Discuss
    • 10. Which of the following statements is not true?

    • Options
    • A. Enzymes are proteins that bind to specific substrates and increase the velocity of reactions involving those substrates
    • B. Enzymes function by overcoming the activation energy barrier of a reaction
    • C. Enzymes make thermodynamically favorable reactions to proceed; they cannot make unfavorable reactions to occur
    • D. Enzymes only function when they are in intact cells
    • Discuss


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