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MCQs

Total Questions : 54 | Page 4 of 6 pages
Question 31.  Which medium is used for the production of Penicillin using immobilized cells
  1.    1% peptone medium
  2.    glucose medium
  3.    Yeast extract medium
  4.    LB broth
 Discuss Question
Answer: Option B. -> glucose medium
Question 32.  During the enzymatic reaction of an immobilized enzyme, the rate of substrate transfer is
  1.    equal to that of substrate consumption
  2.    more than that of substrate consumption
  3.    lesser than that of substrate consumption
  4.    is nothing to do with the substrate consumption
 Discuss Question
Answer: Option A. -> equal to that of substrate consumption
Question 33.  For a steady state condition, the change of substrate concentration (dCs/dt) is
  1.    zero
  2.    1
  3.    >1
 Discuss Question
Answer: Option A. -> zero
Question 34.  The immobilized technique involving chemical method is
  1.    covalent bond formation dependent
  2.    non-covalent bond formation dependent
  3.    both (a) and (b)
  4.    ionic bond formation dependent
 Discuss Question
Answer: Option A. -> covalent bond formation dependent
Question 35. . For glucose isomerization by immobilized enzyme, the reactor generally used is
  1.    CSTR
  2.    plug flow
  3.    packed bed
  4.    fluidized bed
 Discuss Question
Answer: Option C. -> packed bed
Question 36. . 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)
  1.    rp = ksa(Csb-Cs)
  2.    rp = ksaCsb
  3.    rp = ksaCs
  4.    rp = ksa(Csb+Cs)
 Discuss Question
Answer: Option B. -> rp = ksaCsb
Question 37. . Damkohler number(NDa) is
  1.    the ratio of the maximum reaction rate to the maximum mass transfer rate
  2.    the ratio of the minimum reaction rate to the maximum mass transfer rate
  3.    the ratio of the maximum reaction rate to the minimum mass transfer rate
  4.    the ratio of the minimum reaction rate to the minimum mass transfer rate
 Discuss Question
Answer: Option A. -> the ratio of the maximum reaction rate to the maximum mass transfer rate
Question 38. . The most commonly employed cross-linked polymer is the
  1.    polyacrylamide gel
  2.    collagen
  3.    celluloses
  4.    cation exchange resin
 Discuss Question
Answer: Option A. -> polyacrylamide gel
Question 39. . Which of the following is not the correct answer?
  1.    Immobilized enzyme may show selectively altered chemical properties
  2.    Immobilized enzyme may show selectively altered physical properties
  3.    Immobilized enzyme may simulate the realistic natural environment where the enzyme come from the cell
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 40. . Commonly employed water insoluble supports for the covalent attachment of enzyme include
  1.    acrylamide based polymers
  2.    polypeptides
  3.    dextran
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these

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