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Biochemical Engineering
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Immobilized Enzyme
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Question
The covalent attachment of enzyme molecules is via
Options
A. nonessential amino acids residues to water insoluble, functional supports
B. essential amino acids residues to water insoluble, functional supports
C. nonessential amino acids residues to water soluble, functional supports
D. essential amino acids residues to water soluble, functional supports
Correct Answer
nonessential amino acids residues to water insoluble, functional supports
Immobilized Enzyme problems
Search Results
1. Which of the following is taken as an assumption in the distributed model?
Options
A. The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme.
B. Mass transfer through the immobilized enzyme occurs via molecular diffusion
C. There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme
D. All of the above
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Correct Answer: All of the above
2. Functional groups of the nonessential amino acid residues that are suitable for the immobilization process are
Options
A. free ?-, ?- or ? carb oxyl groups
B. ? or ? amino groups
C. phenyl, hydroxyl, sulfhydryl or imidazole groups
D. all of the above
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Correct Answer: all of the above
3. During the enzymatic reaction of an immobilized enzyme, the rate of substrate transfer is
Options
A. equal to that of substrate consumption
B. more than that of substrate consumption
C. lesser than that of substrate consumption
D. is nothing to do with the substrate consumption
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Correct Answer: equal to that of substrate consumption
4. The immobilized technique involving chemical method is
Options
A. covalent bond formation dependent
B. non-covalent bond formation dependent
C. both (a) and (b)
D. ionic bond formation dependent
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Correct Answer: covalent bond formation dependent
5. Water insoluble enzymes can be prepared by using multifunctional agents that are bifunctional in nature and have
Options
A. low molecular weight
B. high molecular weight
C. high equivalent weight
D. low reactivity
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Correct Answer: low molecular weight
6. For glucose isomerization by immobilized enzyme, the reactor generally used is
Options
A. CSTR
B. plug flow
C. packed bed
D. fluidized bed
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Correct Answer: packed bed
7. The effectiveness factor increases with the
Options
A. increase of diffusivity and decreased with the increase of particle size
B. increase of diffusivity and increased with the increase of particle size
C. decrease of diffusivity and decreased with the increase of particle size
D. increase of diffusivity and decrease with the decrease of particle size
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Correct Answer: increase of diffusivity and decreased with the increase of particle size
8. The most commonly employed cross-linked polymer is the
Options
A. polyacrylamide gel
B. collagen
C. celluloses
D. cation exchange resin
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Correct Answer: polyacrylamide gel
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
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Correct Answer: State of immobilization is very sensitive to solution pH, ionic strength and temperature
10. 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
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Correct Answer: an extremely large surface area
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Immobilized Enzyme
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