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- Question
If the specific growth rate, ?. is constant with time during the exponential growth period, the equation correlating bacterial number density Cn), cell number concentration with respect to time can be expressed as
Options- A. Cn= Cn0 exp[? (t - t0)]
- B. Cn0 = Cn exp[? (t - t0)]
- C. Cn/Cn0 =(1/?)exp(t-t0)
- D. Cn0 / Cn = (1/?)exp(t-t0)
- Correct Answer
- Cn= Cn0 exp[? (t - t0)]
- 1. Which category of enzymes belongs to class two in the international classification?
Options- A. Hydrolases
- B. Ligases
- C. Transferases
- D. Isomerase Discuss
- 2. Which of these proteases is not a cysteine active site protease?
Options- A. Calpain
- B. Cathepsin D
- C. Papain
- D. None of the above Discuss
- 3. Enzymes are basically
Options- A. proteins
- B. vitamins
- C. fat
- D. carbohydrates Discuss
- 4. Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l-1, while reactor 2 contained 0.1 g.l-1 of glucose at the start of the process then at steady state
Options- A. the concentration of glucose in reactor 1 would be greater than that in reactor 2
- B. the concentration of glucose in reactor 1 would be equal to reactor 2
- C. the concentration of glucose in reactor 1 would always be zero.
- D. the concentration of glucose in reactor 1 would be less than that in reactor 2 Discuss
- 5. Non-linear relationship between shear stress and shear rate exists in
Options- A. newtonian fluids
- B. non-newtonian fluids
- C. both (a) and (b)
- D. none of these Discuss
- 6. Which of the following impellers will provide radial flow?
Options- A. Paddles
- B. Flat blade turbines
- C. Disk flat blade turbines
- D. All of the above Discuss
- 7. In antibiotic manufacturing processes, the fermentation time ranges from
Options- A. 2-3 weeks
- B. 1-2 weeks
- C. 4-5 weeks
- D. 2-4 weeks Discuss
- 8. Secondary treatment uses __________ to consume wastes.
Options- A. micro-organisms
- B. chemicals
- C. filtration
- D. none of these Discuss
- 9. At 25°C, the saturation concentration of oxygen in water is 1.26 mmol/l and the partial pressure of oxygen is 1 atm. The Henry's law constant will be
Options- A. 0.793atml/mmol
- B. 0.207atml/mmol
- C. 1.26 atml/mmol
- D. 8.74 atml/mmol Discuss
- 10. Sterilization can be carried out by
Options- A. heat
- B. radiation
- C. chemical agents
- D. all of these Discuss
More questions
Correct Answer: Transferases
Correct Answer: Cathepsin D
Correct Answer: proteins
Correct Answer: the concentration of glucose in reactor 1 would be equal to reactor 2
Correct Answer: non-newtonian fluids
Correct Answer: All of the above
Correct Answer: 4-5 weeks
Correct Answer: micro-organisms
Correct Answer: 0.793atml/mmol
Correct Answer: all of these
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