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Home ‣ Biochemical Engineering ‣ Fermentation Reactors See What Others Are Saying!
- Question
Production of organic acids in batch culture is generally growth associated phase followed by non-growth associated production. The probable reason for this is that
Options- A. organic acids uncouple catabolism from anabolism
- B. biomass yields increase as the fermentation proceeds
- C. organic acids are secondary metabolites
- D. high concentrations of organic acid promote the growth of the microbial population
- Correct Answer
- organic acids uncouple catabolism from anabolism
- 1. Which of the following affect the Kolmogorov eddy size?
Options- A. Stirrer speed
- B. Physical properties of the liquid
- C. Size and type of impeller
- D. All of these Discuss
- 2. The mechanical means of accomplishing sterilization of fermentation media/equipment is
Options- A. ultrasonic
- B. radiation
- C. chemical agents
- D. none of these Discuss
- 3. A noncompetitive inhibitor of an enzyme-catalyzed reaction
Options- A. increases KM and increases Vmax
- B. increases KM and reduces Vmax
- C. reduces KM and increases Vmax
- D. reduces KM and reduces Vmax Discuss
- 4. Which of the following statement(s) regarding enzymes, is/are false?
Options- A. Enzymes are always proteins that function as catalysts
- B. Enzymes provide activation energy for reactions
- C. Enzyme activity can be regulated
- D. Enzymes may be used many times for a specific reaction Discuss
- 5. The Monod Model relates
Options- A. substrate utilized with the biomass consumption
- B. specific growth rate to the substrate availability
- C. yield with the biomass utilization
- D. the biomass concentration with specific growth rate Discuss
- 6. The advantage of axial flow impellers over radial flow impellers is that axial flow impellers
Options- A. provide better lift of solids
- B. provide high shear conditions
- C. provide low shear conditions
- D. are cheaper to build Discuss
- 7. Which is not the method for producing immobilized enzymes with multifunctional reagents?
Options- A. Enzymes are adsorbed on the surface active support followed by intermolecular cross linking
- B. Functional groups are introduced on the support to react co-valently with enzymes
- C. Enzymes are cross linked intermolecularly
- D. None of the above Discuss
- 8. Conventional tertiary treatment is
Options- A. chemical coagulation and flocculation
- B. filtration
- C. sedimentation
- D. none of these Discuss
- 9. The bitter taste of the high protein materials is reduced by using
Options- A. invertase
- B. dectinase
- C. protease
- D. none of these Discuss
- 10. The ultimate source of water is
Options- A. rivers and lakes
- B. dew and forest
- C. rain and snow
- D. underground and surface Discuss
More questions
Correct Answer: All of these
Correct Answer: ultrasonic
Correct Answer: increases KM and reduces Vmax
Correct Answer: Enzymes provide activation energy for reactions
Correct Answer: specific growth rate to the substrate availability
Correct Answer: provide better lift of solids
Correct Answer: None of the above
Correct Answer: chemical coagulation and flocculation
Correct Answer: protease
Correct Answer: rain and snow
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