Self-Evaluation

Q1. The maximum specific growth rate of a microorganism is the-
       (A)   Lag phase of microbial cultivation.
       (B)   Log phase of microbial cultivation.
       (C)   Death phase of microbial cultivation.
       (D)   Both lag phase and log phase of microbial cultivation

Q2. The unit of productivity of the fermentation is -
       (A)   Slope of the Biomass vs time curve
       (B)   Slope of Loge (biomass) vs time curve during exponential phase of the cultivation
       (C)   Slope of Log10 (biomass) vs time curve during exponential phase of the cultivation
       (D)   Slope of Loge (biomass) vs time curve

Q3. In a typical batch cultivation, the specific growth rate follows zero order kinetics if -
       (A)   g/L
       (B)   g/h
       (C)   g/L-h
       (D)   None of the above

Q4. According to Monod’s Model, the specific growth rate is given by -
       (A)   S>>KS
       (B)   KS >>S
       (C)   KS = 0
       (D)   S>>KS

Q5. The Monod’s model assumes that -
       (A)   µ = µmax S / (S + KS)
       (B)   µ = µmax KS / (S + KS)
       (C)   µ = µmax S / (S2 + KS)
       (D)   µ = µmax Sn / (Sn + KSn)

Q6. The Monod model is unable to describe -
       (A)   the culture is homogenously distributed in the bioreactor
       (B)   all the microorganisms are similar in nature in the bioreactor
       (C)   there is no inhibition of culture metabolism during growth
       (D)   All of the above

Q7. The total cell number can be measured by -
       (A)   lag phase in the batch cultivation.
       (B)   Transient phase(s) of continuous cultivation.
       (C)   Culture metabolism in the presence of inhibitory product
       (D)   All of the above

Q8. The lag phase of the cultivation can be minimized by -
       (A)   Dry cell mass
       (B)   Heamocytometer
       (C)   Coulter counter
       (D)   All of the above

Q9. Maintenance coefficient describes -
       (A)   Substrate consumption for the overall growth of microorganism
       (B)   Substrate consumption for product formation during the cultivation
       (C)   Substrate consumption during the lag phase of the cultivation
       (D)   Substrate consumption during the stationery phase of the cultivation

Q10. The batch cultivation invariably feature lower productivity primarily due to -
       (A)   Highly dynamic condition during the cultivation
       (B)   High non production time
       (C)   Production inhibition
       (D)   Severe substrate limitation