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- Question
Which of the following is taken as an assumption in the distributed model?
Options- 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
- All of the above
- 1. 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
- 2. 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
- 3. 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
- 4. Which of the following is not correct with regards to continuous cultures?
Options- A. The major industrial scale application of continuous cultures is in waste water treatment
- B. Mutation and contamination present a major risk to the operation of continuous cultures for the production of metabolites
- C. The continuous cultures is very useful for the production of pharmaceuticals
- D. Continuous cultures have an advantage that they do not need to shut down as regularly as batch culture reactor Discuss
- 5. A fed-batch reactor containing 1 g.l-1 of substrate in 2 litre of medium. It is fed with 1 g.l-l of substrate at the rate of 1 litre per hour. After 10 hours, the concentration of substrate in the reactor was 0.5 g.l-1 . The mass of substrate that was used by the culture in the reactor was
Options- A. 2g
- B. 6g
- C. 8g
- D. 12g Discuss
- 6. In aerobic yeast fermentation for production of citric acid from alkanes using a fed-batch culture, why alkanes are slowly fed to the yeast?
Options- A. Citric acid is toxic to the cells
- B. Alkanes cause foaming
- C. Fast addition of alkanes will inhibit the cells and reduce oxygen transfer rates
- D. Fast addition of alkanes will cause the cells to grow too quickly Discuss
- 7. Power number is ratio of
Options- A. imposed forced to intertial force
- B. bouyant force to inertial force
- C. gravitation force to inertial force
- D. imposed force to gravitational force Discuss
- 8. Yield coefficient represents
Options- A. total biomass or product produced
- B. conversion efficiency of a substrate into product
- C. conversion rate of a substrate into biomass or product
- D. production time of biomass or product Discuss
- 9. The purest form of naturally occurring water is
Options- A. rain water
- B. river water
- C. pond water
- D. well water Discuss
- 10. Which of the following impellers are used for wide range of viscosities?
Options- A. paddles
- B. turbines
- C. propellers
- D. none of these Discuss
More questions
Correct Answer: rmaxS/(Km + S)(1+I/Ki)
Correct Answer: rmaxS/(Km (1+I/Ki)+S))
Correct Answer: Penicillin
Correct Answer: The continuous cultures is very useful for the production of pharmaceuticals
Correct Answer: 6g
Correct Answer: Fast addition of alkanes will inhibit the cells and reduce oxygen transfer rates
Correct Answer: imposed forced to intertial force
Correct Answer: conversion efficiency of a substrate into product
Correct Answer: rain water
Correct Answer: turbines
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