Discussion
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- Question
The increased air flow rate in bubble column fermenter can cause excessive foaming and high retention of air bubbles in the column which
Options- A. decreases the productivity of the fermenter
- B. increases the productivity of the fermenter
- C. modestly increases the productivity of the fermenter
- D. does not affect on the productivity
- Correct Answer
- decreases the productivity of the fermenter
- 1. The enzyme used to reduce bitterness of grapes commonly contains
Options- A. ?-L-rhamonosidase
- B. ?-d-glucosidase
- C. ?- galactosidase
- D. both (a) and (b) Discuss
- 2. Liquefaction of starch to dextrin is carried out by
Options- A. ?-amylase
- B. cellulase
- C. pectinase
- D. all of these Discuss
- 3. 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
- 4. 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
- 5. Trichoderma ?-glucanase is reported
Options- A. to stabilize mashing
- B. to convert taste fractions of dextrins to fermentable sugars in beer
- C. to convert starch to dextrin
- D. all of the above Discuss
- 6. The maximum specific growth rate of an organism depends on
Options- A. medium composition
- B. temperature
- C. pH
- D. All of these Discuss
- 7. A higher Ks value of Monod's equation means
Options- A. greater affinities to substrate
- B. lower affinities to substrate
- C. unaffected with the substrate bonding
- D. lower dissociation constant value Discuss
- 8. The high oxygen transfer efficiencies of airlift bioreactors is due to
Options- A. the large aspect ratio of the reactor, which leads to a high gas hold-up
- B. the large aspect ratio of the reactor, which leads to a high oxygen solubility at the base of the reactor
- C. the draft tube, which reduces bubble coalescence in the reactor
- D. all of the above Discuss
- 9. 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
- 10. Which of the following is correct for the prediction of time requirement in a batch fermenter?
Options- A. Carrying out experiments
- B. Mathematical modelling of the fermentation process
- C. Both (a) and (b)
- D. It is impossible to predict the time required for fermentation Discuss
Fermentation Kinetics problems
Search Results
Correct Answer: both (a) and (b)
Correct Answer: ?-amylase
Correct Answer: Phenyl alanine and methonine
Correct Answer: all of these
Correct Answer: to stabilize mashing
Correct Answer: All of these
Correct Answer: greater affinities to substrate
Correct Answer: all of the above
Correct Answer: no further increase in the cell population after a maximum value
Correct Answer: Both (a) and (b)
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