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- Question
Animal cell cultures do not have much effect on shear forces because
Options- A. the cell size is generally smaller than the critical eddy size at which shear will have an effect
- B. cells are larger than the critical eddy size at which shear will have an effect
- C. animal cells have cell walls
- D. animal cells have cell membranes
- Correct Answer
- the cell size is generally smaller than the critical eddy size at which shear will have an effect
- 1. Vortexing in stirred tank reactors can be prevented by
Options- A. installing baffles in the reactor
- B. shifting the impeller to an off-centre position
- C. Both (a) and (b)
- D. using axial flow impellers Discuss
- 2. Which pattern of mixing is preferred in stirred tank reactors during the culture of aerobic microorganisms?
Options- A. Laminar flow
- B. Transient flow
- C. turbulent flow
- D. all of these Discuss
- 3. Which graphical method is used to determine an enzyme degree of cooperativity?
Options- A. Hill plot
- B. Koshland curve
- C. Michaelis-Menten hyperbola
- D. Can not be determined Discuss
- 4. The rate limiting step in the movement of oxygen from the gas phase in a bubble to the cell is the movement of oxygen molecules through
Options- A. gas-liquid interface
- B. bubble boundary layer
- C. bulk liquid
- D. gas phase Discuss
- 5. The heated medium passes through a holding section, which is usually maintained in
Options- A. adiabatic conditions
- B. isothermal conditions
- C. isotropic conditions
- D. isobaric conditions Discuss
- 6. The equation for the rate of product formation for simple enzyme reaction is given by (Where rmax, maximum reaction rate, Cs substrate concentration, Cp product concentration ES, CES enzyme-substrate concentration)
Options- A. rp = rmax Cs/(Km+Cs)
- B. rp= rmax CES/(Km+ CES)
- C. rp = rmax Cs/(Km+CES)
- D. rp = rmax Cs/(Km+Cp) Discuss
- 7. Chymosin hydrolyses the bond between
Options- A. Alanine and glycine
- B. Phenyl alanine and methonine
- C. Glutamic acid and alanine
- D. Alanine and phenyl alanine Discuss
- 8. Reynolds (Rei) number for the impeller is given by (where Di, stirrer diameter; N, stirrer speed, ?, density of fluid and ?, viscosity of fluid)
Options- A. DiV?/?
- B. Di2N?/?
- C. Di2V?/?
- D. DiN? /? Discuss
- 9. A fed-batch reactor containing 2 litre of medium and 0.1 g.l-l of biomass is fed with a medium containing 1 g.l-1 of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l-1, then the biomass produced during the 10 hour period is
Options- A. 1.5 g
- B. 2.2 g
- C. 3.0 g
- D. 6.0 g Discuss
- 10. Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with
Options- A. 10% calcium chloride solution
- B. 10% magnesium sulfate solution
- C. 10% magnesium chloride solution
- D. 10% sodium chloride solution Discuss
More questions
Correct Answer: Both (a) and (b)
Correct Answer: turbulent flow
Correct Answer: Hill plot
Correct Answer: bubble boundary layer
Correct Answer: adiabatic conditions
Correct Answer: rp = rmax Cs/(Km+Cs)
Correct Answer: Phenyl alanine and methonine
Correct Answer: Di2N?/?
Correct Answer: 2.2 g
Correct Answer: 10% sodium chloride solution
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