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Home Biochemical Engineering Immobilized Enzyme See What Others Are Saying!
  • Question
  • If Damkohler number, NDa >>1, the reaction rate is much greater than the mass transfer rate and the overall reaction is controlled by the rate of mass transfer. In this case, the enzyme reaction can be described as (where Csb and Cs are the substrate concentration in bulk of solution and at the immobilized enzyme surface respectively. ks mass transfer coefficient, and a is the surface area of an immobilized enzyme particles)


  • Options
  • A. rp = ksa(Csb-Cs)
  • B. rp = ksaCsb
  • C. rp = ksaCs
  • D. rp = ksa(Csb+Cs)

  • Correct Answer
  • rp = ksaCsb 


  • More questions

    • 1. Which category of enzymes belongs to class two in the international classification?

    • Options
    • A. Hydrolases
    • B. Ligases
    • C. Transferases
    • D. Isomerase
    • Discuss
    • 2. Which of these proteases is not a cysteine active site protease?

    • Options
    • A. Calpain
    • B. Cathepsin D
    • C. Papain
    • D. None of the above
    • Discuss
    • 3. Enzymes are basically

    • Options
    • A. proteins
    • B. vitamins
    • C. fat
    • D. carbohydrates
    • Discuss
    • 4. Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l-1, while reactor 2 contained 0.1 g.l-1 of glucose at the start of the process then at steady state

    • Options
    • A. the concentration of glucose in reactor 1 would be greater than that in reactor 2
    • B. the concentration of glucose in reactor 1 would be equal to reactor 2
    • C. the concentration of glucose in reactor 1 would always be zero.
    • D. the concentration of glucose in reactor 1 would be less than that in reactor 2
    • Discuss
    • 5. Non-linear relationship between shear stress and shear rate exists in

    • Options
    • A. newtonian fluids
    • B. non-newtonian fluids
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 6. Which of the following impellers will provide radial flow?

    • Options
    • A. Paddles
    • B. Flat blade turbines
    • C. Disk flat blade turbines
    • D. All of the above
    • Discuss
    • 7. In antibiotic manufacturing processes, the fermentation time ranges from

    • Options
    • A. 2-3 weeks
    • B. 1-2 weeks
    • C. 4-5 weeks
    • D. 2-4 weeks
    • Discuss
    • 8. Secondary treatment uses __________ to consume wastes.

    • Options
    • A. micro-organisms
    • B. chemicals
    • C. filtration
    • D. none of these
    • Discuss
    • 9. At 25°C, the saturation concentration of oxygen in water is 1.26 mmol/l and the partial pressure of oxygen is 1 atm. The Henry's law constant will be

    • Options
    • A. 0.793atml/mmol
    • B. 0.207atml/mmol
    • C. 1.26 atml/mmol
    • D. 8.74 atml/mmol
    • Discuss
    • 10. Sterilization can be carried out by

    • Options
    • A. heat
    • B. radiation
    • C. chemical agents
    • D. all of these
    • Discuss


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