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- Question
The diameter of the baffles in a standard stirred tank bioreactor ranges from
Options- A. 1/10th - 1/12th of the tank diameter
- B. 1/3rd - 1/4th of the tank diameter
- C. 1/15th - 1/20th of the tank diameter
- D. 1/20th - 1/25th of the tank diameter
- Correct Answer
- 1/10th - 1/12th of the tank diameter
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. If the viscosity of a fluid decreases with increasing stirrer speed, then the nature of the fluid is
Options- A. newtonian
- B. pseudoplastic
- C. dilatant
- D. thixotropic Discuss
- 7. The covalent attachment of enzyme molecules is via
Options- A. nonessential amino acids residues to water insoluble, functional supports
- B. essential amino acids residues to water insoluble, functional supports
- C. nonessential amino acids residues to water soluble, functional supports
- D. essential amino acids residues to water soluble, functional supports Discuss
- 8. Which of the following is not a physical method of immobilization?
Options- A. Adsorption
- B. Entrapment
- C. Micro encapsulation
- D. None of these Discuss
- 9. In the stationary phase
Options- A. growth is proportional to death
- B. growth rate is equal to death rate
- C. growth rate is lesser than death rate
- D. no co-relation exist between death rate and growth rate Discuss
- 10. Which of the following mainly serve to convert starch into high fructose corn syrup (HFCS)?
Options- A. ?-amylase
- B. Gluco-isomerase
- C. Gluco-amylase
- D. all of these Discuss
More questions
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
Correct Answer: pseudoplastic
Correct Answer: nonessential amino acids residues to water insoluble, functional supports
Correct Answer: None of these
Correct Answer: growth rate is equal to death rate
Correct Answer: all of these
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