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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. From the following sanitizers which one comes under category of surface active agents?

    • Options
    • A. Tetra phosphate
    • B. Teepol
    • C. Meta phosphate
    • D. None of these
    • Discuss
    • 2. Discoloration can be achieved by using

    • Options
    • A. sulphloydryl oxidase
    • B. proteases
    • C. anthocyanase
    • D. all of these
    • Discuss
    • 3. An internal draft tube is preferrred to an external draft tube because

    • Options
    • A. it is easier to clean and sterilize a reactor
    • B. it is cheaper to build a reactor with an internal draft tube
    • C. Both (a) and (b)
    • D. none of the above
    • Discuss
    • 4. The conformational change in an enzyme after the substrate is bound that allows the chemical reaction to proceed, can be explained by

    • Options
    • A. induced fit
    • B. transition
    • C. fit and fine
    • D. Pasteur
    • Discuss
    • 5. The most commonly employed cross-linked polymer is the

    • Options
    • A. polyacrylamide gel
    • B. collagen
    • C. celluloses
    • D. cation exchange resin
    • Discuss
    • 6. Fed batch reactors is used to produce vinegar because

    • Options
    • A. it can maintain low ethanol concentrations
    • B. it can maintain low acetic acid concentrations
    • C. acetic acid bacteria tend to ferment at high ethanol concentrations
    • D. all of the above
    • Discuss
    • 7. For glucose isomerization by immobilized enzyme, the reactor generally used is

    • Options
    • A. CSTR
    • B. plug flow
    • C. packed bed
    • D. fluidized bed
    • Discuss
    • 8. If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is

    • Options
    • A. newtonian
    • B. rheopectic
    • C. viscoelastic
    • D. thixotropic
    • Discuss
    • 9. The SI unit for viscosity is

    • Options
    • A. kg.m-1.s-1
    • B. kg.m-2.s-2
    • C. kg.m-3.s-1
    • D. kg.m-1.s-2
    • Discuss
    • 10. The support material for immobilization of cells of Bacillus subtilis is

    • Options
    • A. ion exchange resins
    • B. gelatin
    • C. Anthracite
    • D. agarose and carbodiimide
    • Discuss


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