Questions and answers for exam Preparation

MCQs

Total Questions : 54 | Page 2 of 6 pages

Question 11. Water insoluble enzymes can be prepared by using multifunctional agents that are bifunctional in nature and have

low molecular weight
high molecular weight
high equivalent weight
low reactivity

Discuss Question

Answer: Option A. -> low molecular weight
Answer: (a).low molecular weight

Question 12. Which medium is used for the production of Penicillin using immobilized cells

1% peptone medium
glucose medium
Yeast extract medium
LB broth

Discuss Question

Answer: Option B. -> glucose medium
Answer: (b).glucose medium

Question 13. Functional groups of the nonessential amino acid residues that are suitable for the immobilization process are

free α-, β- or γ carb oxyl groups
α or β amino groups
phenyl, hydroxyl, sulfhydryl or imidazole groups
all of the above

Discuss Question

Answer: Option D. -> all of the above
Answer: (d).all of the above

Question 14. Which of the following is taken as an assumption in the distributed model?

The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme.
Mass transfer through the immobilized enzyme occurs via molecular diffusion
There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme
All of the above

Discuss Question

Answer: Option D. -> All of the above
Answer: (d).All of the above

Question 15. The immobilized enzyme produced by micro encapsulation technique provides

an extremely large surface area
smaller surface area
high amount of solvent
relatively smaller surface area

Discuss Question

Answer: Option A. -> an extremely large surface area
Answer: (a).an extremely large surface area

Question 16. Which is not the method for producing immobilized enzymes with multifunctional reagents?

Enzymes are adsorbed on the surface active support followed by intermolecular cross linking
Functional groups are introduced on the support to react co-valently with enzymes
Enzymes are cross linked intermolecularly
None of the above

Discuss Question

Answer: Option D. -> None of the above
Answer: (d).None of the above

Question 17. Which of the following is the commonly employed adsorbents?

Calcium carbonate
Alumina
Celluloses
All of these

Discuss Question

Answer: Option D. -> All of these
Answer: (d).All of these

Question 18. The immobilization technique involving physical method is

covalent bond formation dependent
non-covalent bond formation dependent
both (a) and (b)
ionic bond formation dependent

Discuss Question

Answer: Option B. -> non-covalent bond formation dependent
Answer: (b).non-covalent bond formation dependent

Question 19. The effectiveness factor increases with the

increase of diffusivity and decreased with the increase of particle size
increase of diffusivity and increased with the increase of particle size
decrease of diffusivity and decreased with the increase of particle size
increase of diffusivity and decrease with the decrease of particle size

Discuss Question

Answer: Option A. -> increase of diffusivity and decreased with the increase of particle size
Answer: (a).increase of diffusivity and decreased with the increase of particle size

Question 20. Various techniques are available for determining the effective diffusivity of solute in gel. Thin disk method uses

a diffusion cell with two compartments divided by a thin gel
a diffusion cell with two compartments
a diffusion cell with two compartments plus by a thin gel
a diffusion cell with two compartments multiply by a thin gel

Discuss Question

Answer: Option A. -> a diffusion cell with two compartments divided by a thin gel
Answer: (a).a diffusion cell with two compartments divided by a thin gel