Immobilized Enzyme – Section 1

1. Water-insoluble enzymes can be prepared by using multifunctional agents that are bifunctional in nature and have

A. low molecular weight
B. high molecular weight
C. high equivalent weight
D. low reactivity

Correct Answer: A. low molecular weight

2. Functional groups of the nonessential amino acid residues that are suitable for the immobilization process are

A. free α-, β- or γ carboxyl groups
B. α or β amino groups
C. phenyl, hydroxyl, sulfhydryl or imidazole groups
D. all of the above

Correct Answer: D. all of the above

3. Which medium is used for the production of Penicillin using immobilized cells

A. 1% peptone medium
B. glucose medium
C. Yeast extract medium
D. LB broth

Correct Answer: B. glucose medium

4. Which of the following is taken as an assumption in the distributed model?

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

Correct Answer: D. All of the above

5. The immobilized enzyme produced by the microencapsulation technique provides

A. an extremely large surface area
B. smaller surface area
C. high amount of solvent
D. relatively smaller surface area

Correct Answer: A. an extremely large surface area

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