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- Question
The specific growth rate (?) is defined as
Options- A. the concentration of biomass in the reactor
- B. rate of increase of total biomass in a reactor
- C. the rate of individual cells division or increase in their biomass
- D. the rate of cell death
- Correct Answer
- the rate of individual cells division or increase in their biomass
- 1. Which of the following is not correct for the Monod model and the Michaelis Menten Model?
Options- A. The Michaelis Menten Model was derived from a curve fitting exercise
- B. The Michaelis Menten model was derived from an analysis of the mechanism of microbial growth
- C. The Monod model was derived from an analysis of the mechanism of microbial growth
- D. All of the above Discuss
- 2. Stationary phase is described as
Options- A. no further increase in the cell population after a maximum value
- B. deceleration of growth and division rate after the growth rate reaches a maximum
- C. acceleration of growth and division rate after the growth rate reaches a maximum
- D. deceleration of growth and division rate after the growth rate reaches a minimum Discuss
- 3. Which of the following compound, if added to a solution will lead to the greatest increase in viscosity?
Options- A. A globular protein
- B. Glucose
- C. A long chain protein such as albumin
- D. Water Discuss
- 4. Which of the following statements is true for enzymatically catalyzed reaction?
Options- A. The activation energy of the reaction is lowered so that a larger proportion of the substrate qualifies to overcome it
- B. Additional substrate molecules are energized to overcome the activation energy of the reaction
- C. The activation energy of the reaction is increased, thus decreasing the likelihood that any substrate molecules will overcome it
- D. The activation energy of the reaction is lowered so that a fewer substrate molecules can overcome it Discuss
- 5. If liquid density and viscosity remains constant, then the Reynolds number in a stirred tank reactor will vary with the
Options- A. impeller diameter
- B. square root of the impeller diameter
- C. square of the impeller diameter
- D. cube of the impeller diameter Discuss
- 6. An enzyme is assayed at an initial substrate concentration of 2 x 10-5M. In 6 minute, half of the substrate is used. The Km for the substrate is 2 x 10-3M. The value of k in minute is
Options- A. 0.115
- B. 0.42
- C. 0.093
- D. 6.693 Discuss
- 7. The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly
Options- A. increased in a dry state
- B. decreased in a dry state
- C. increased in a wet state
- D. decreased in a wet state Discuss
- 8. Zeolite softening process removes
Options- A. only temporary hardness of water
- B. only permanent hardness of water
- C. both temporary and permanent hardness of water
- D. the dissolved gases in permanent hard water Discuss
- 9. ?-amylase is an endo enzyme which requires
Options- A. Ca
- B. Cu
- C. Mn
- D. None of these Discuss
- 10. Heat transfer rates (per unit volume) will be lowest in
Options- A. Stirred tank bioreactor with biomass recycle
- B. Continuous air lift bioreactor
- C. Continuous packed bed reactor
- D. Continuous fluidized bed bioreactor Discuss
More questions
Correct Answer: The Monod model was derived from an analysis of the mechanism of microbial growth
Correct Answer: no further increase in the cell population after a maximum value
Correct Answer: A long chain protein such as albumin
Correct Answer: The activation energy of the reaction is lowered so that a larger proportion of the substrate qualifies to overcome it
Correct Answer: square of the impeller diameter
Correct Answer: 0.115
Correct Answer: increased in a dry state
Correct Answer: both temporary and permanent hardness of water
Correct Answer: Ca
Correct Answer: Continuous packed bed reactor
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