Discussion
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- Question
If a reaction occurs in the absence of inhibitor with rate ?0 and in the presence of inhibitor with rate ?i, the degree of inhibition is defined as
Options- A. (?0 - ?i)/?0
- B. (?0 + ?i)/?0
- C. (?0?i)/?0
- D. (?0-?i)/?i
- Correct Answer
- (?0 - ?i)/?0
- 1. Discoloration can be achieved by using
Options- A. sulphloydryl oxidase
- B. proteases
- C. anthocyanase
- D. all of these Discuss
- 2. An internal draft tube is preferrred to an external draft tube because
Options- A. it is easier to clean and sterilize a reactor
- B. it is cheaper to build a reactor with an internal draft tube
- C. Both (a) and (b)
- D. none of the above Discuss
- 3. The conformational change in an enzyme after the substrate is bound that allows the chemical reaction to proceed, can be explained by
Options- A. induced fit
- B. transition
- C. fit and fine
- D. Pasteur Discuss
- 4. The most commonly employed cross-linked polymer is the
Options- A. polyacrylamide gel
- B. collagen
- C. celluloses
- D. cation exchange resin Discuss
- 5. Fed batch reactors is used to produce vinegar because
Options- A. it can maintain low ethanol concentrations
- B. it can maintain low acetic acid concentrations
- C. acetic acid bacteria tend to ferment at high ethanol concentrations
- D. all of the above Discuss
- 6. For glucose isomerization by immobilized enzyme, the reactor generally used is
Options- A. CSTR
- B. plug flow
- C. packed bed
- D. fluidized bed Discuss
- 7. If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is
Options- A. newtonian
- B. rheopectic
- C. viscoelastic
- D. thixotropic Discuss
- 8. The SI unit for viscosity is
Options- A. kg.m-1.s-1
- B. kg.m-2.s-2
- C. kg.m-3.s-1
- D. kg.m-1.s-2 Discuss
- 9. The support material for immobilization of cells of Bacillus subtilis is
Options- A. ion exchange resins
- B. gelatin
- C. Anthracite
- D. agarose and carbodiimide Discuss
- 10. If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will
Options- A. always decrease with dilution rate
- B. increase with dilution rate until washout
- C. remain constant irrespective of the dilution rate
- D. decrease with dilution rate until washout Discuss
More questions
Correct Answer: anthocyanase
Correct Answer: it is easier to clean and sterilize a reactor
Correct Answer: induced fit
Correct Answer: polyacrylamide gel
Correct Answer: it can maintain low ethanol concentrations
Correct Answer: packed bed
Correct Answer: thixotropic
Correct Answer: kg.m-1.s-1
Correct Answer: agarose and carbodiimide
Correct Answer: increase with dilution rate until washout
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