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- Question
A higher liquid height will lead to a higher gas hold up by which the oxygen transfer rate will be
Options- A. higher throughout the reactor
- B. lower throughout the reactor
- C. higher at the base of the reactor
- D. lower at the base of the reactor
- Correct Answer
- higher at the base of the reactor
- 1. To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, ? can be defined as
Options- A. reaction rate/rate if not slowed by diffusion
- B. rate if not slowed by diffusion/ reaction rate
- C. actual reaction rate/ rate if not slowed by diffusion
- D. rate if not slowed by diffusion/ actual reaction rate Discuss
- 2. 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 Discuss
- 3. Which of the statement is true for continuous reactor at steady state?
Options- A. The rates of biomass, substrate and product concentrations are zero
- B. Biomass, substrate and product concentrations are zero
- C. Biomass, substrate and product concentrations do not change with time
- D. Biomass, substrate and product concentrations change with time Discuss
- 4. Start up expenses in a fermentation industry varies from
Options- A. 0-5% of the capital cost
- B. 10-15% of the capital cost
- C. 5-10% of the capital cost
- D. 15-20% of the capital cost Discuss
- 5. Given an enzyme with a Km = 10m M and Vmax = 100 m mol/min. If [S] = 100 m M, which of the following will be true?
Options- A. A 10 fold increase in Vmax would increase velocity 10 fold y
- B. A 10 fold decrease in Km would increase velocity
- C. Both (a) and (b)
- D. A 10 fold increase in Vmax would decrease velocity 20 fold Discuss
- 6. During fermentation, the saturation concentration of oxygen was reduced from 7 ppm. to 1 ppm. Which one of the following conclusions can be drawn?
Options- A. Microbial growth is oxygen limited since the oxygen concentration is lesser than the saturation concentration
- B. Microbial growth is not oxygen limited since the oxygen concentration is lesser than the saturation concentration
- C. Experimental error leads to the reduction
- D. No conclusion can be drawn Discuss
- 7. Power consumption by agitation is
Options- A. a function of physical properties
- B. a function of operating conditions
- C. a function of vessel and impeller geometry
- D. all of the above Discuss
- 8. The rate equation in non-competitive inhibition based on Michaelis Menten equation is given by
Options- A. rmaxS/(Km + S)(1+I/Ki)
- B. rmaxE/(Km (1+I/Ki)+S))
- C. VmaxS/(Km + S)(1+I/Ki)
- D. rmaxS/Km Discuss
- 9. The rate equation in competitive inhibition based on Michaelis Menten equation is given by
Options- A. rmaxS/(Km (1+I/Ki)+S))
- B. rmaxE/(Km (1+I/Ki)+S))
- C. rmaxI/(Km (1+I/Ki)+S))
- D. rmaxS/(Km (1+I/Ki)) Discuss
- 10. Which of the following is best described as secondary metabolite?
Options- A. Acetic acid produced from the oxidation of ethanol
- B. Ethanol from the fermentation of glucose
- C. Penicillin
- D. Citric acid from the partial oxidation of glucose Discuss
More questions
Correct Answer: actual reaction rate/ rate if not slowed by diffusion
Correct Answer: an extremely large surface area
Correct Answer: Biomass, substrate and product concentrations do not change with time
Correct Answer: 5-10% of the capital cost
Correct Answer: A 10 fold increase in Vmax would increase velocity 10 fold y
Correct Answer: No conclusion can be drawn
Correct Answer: all of the above
Correct Answer: rmaxS/(Km + S)(1+I/Ki)
Correct Answer: rmaxS/(Km (1+I/Ki)+S))
Correct Answer: Penicillin
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