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- Question
Damkohler number(NDa) is
Options- A. the ratio of the maximum reaction rate to the maximum mass transfer rate
- B. the ratio of the minimum reaction rate to the maximum mass transfer rate
- C. the ratio of the maximum reaction rate to the minimum mass transfer rate
- D. the ratio of the minimum reaction rate to the minimum mass transfer rate
- Correct Answer
- the ratio of the maximum reaction rate to the maximum mass transfer rate
- 1. Which of the following is not a physical method of immobilization?
Options- A. Adsorption
- B. Entrapment
- C. Micro encapsulation
- D. None of these Discuss
- 2. Which medium is used for the production of Penicillin using immobilized cells
Options- A. 1% peptone medium
- B. glucose medium
- C. Yeast extract medium
- D. LB broth Discuss
- 3. Various techniques are available for determining the effective diffusivity of solute in gel. Thin disk method uses
Options- A. a diffusion cell with two compartments divided by a thin gel
- B. a diffusion cell with two compartments
- C. a diffusion cell with two compartments plus by a thin gel
- D. a diffusion cell with two compartments multiply by a thin gel Discuss
- 4. Which of the following is the commonly employed adsorbents?
Options- A. Calcium carbonate
- B. Alumina
- C. Celluloses
- D. All of these Discuss
- 5. The immobilized enzyme produced by micro encapsulation technique provides
Options- A. an extremely large surface area
- B. smaller surface area
- C. high amount of solvent
- D. relatively smaller surface area Discuss
- 6. 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) Discuss
- 7. Which of the following is not the correct answer?
Options- A. Immobilized enzyme may show selectively altered chemical properties
- B. Immobilized enzyme may show selectively altered physical properties
- C. Immobilized enzyme may simulate the realistic natural environment where the enzyme come from the cell
- D. None of the above Discuss
- 8. The immobilization technique involving physical method is
Options- A. covalent bond formation dependent
- B. non-covalent bond formation dependent
- C. both (a) and (b)
- D. ionic bond formation dependent Discuss
- 9. Commonly employed water insoluble supports for the covalent attachment of enzyme include
Options- A. acrylamide based polymers
- B. polypeptides
- C. dextran
- D. all of these Discuss
- 10. For a steady state condition, the change of substrate concentration (dCs/dt) is
Options- A. zero
- B. 1
- C. >1
- D. <1 Discuss
Immobilized Enzyme problems
Search Results
Correct Answer: None of these
Correct Answer: glucose medium
Correct Answer: a diffusion cell with two compartments divided by a thin gel
Correct Answer: All of these
Correct Answer: an extremely large surface area
Correct Answer: rp = ksaCsb
Correct Answer: None of the above
Correct Answer: non-covalent bond formation dependent
Correct Answer: all of these
Correct Answer: zero
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