Self-Evaluation

Q1. Unstructured model can describe:
       (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 final electron acceptors in an aerobic cultivation are:
       (A)   Intermediates of metabolic pathway
       (B)   Substrate
       (C)   Oxygen
       (D)   None of the above

Q3. Fed-batch cultivation is generally applied for:
       (A)   substrate inhibited fermentations
       (B)   product inhibited fermentations
       (C)   both substrate and product inhibited fermentations
       (D)   all kinds of cultivations irrespective of inhibition

Q4. Balanced growth features:
       (A)   Constant values of biomass DNA, RNA etc.
       (B)   Constant increase of biomass DNA, RNA etc.
       (C)   No increase in biomass
       (D)   None of the above

Q5. D- Sorbitol to L-Sorbose bio-conversion is possible by:
       (A)   Both chemical & microbial processes
       (B)   Microbial cultivation only
       (C)   Chemical process only
       (D)   None of the above

Q6. Batch cultivation features:
       (A)   High non production time and low productivity
       (B)   Low non production time and high productivity
       (C)   High yield and productivity
       (D)   Low yield and high productivity

Q7. Maintenance functions in the cell include:
       (A)   Substrate consumed for turn-over of cell material.
       (B)   Substrate consumed for mobility of the cell.
       (C)   Maintenance of intracellular pH
       (D)   All of the above

Q8. Cell mass is not the true reflection of the cell activity as:
       (A)   It consists of both living as well as dead cells
       (B)   It reflects cell population which are in the different phase of cell cultivation
       (C)   It reflect only the exponential phase cells
       (D)   Both A & B

Q9. Advantage of Unstructured model are:
       (A)   Lumped simple representation of cell activity for the complex metabolic
                     reactions.
       (B)   Easy experimental verifications of its predictions.
       (C)   Its better prediction ability in the dynamic conditions.
       (D)   Both A & B

Q10. The lag phase of the cultivation could be reduced:
       (A)   By taking exponentially growing culture
       (B)   By taking large inoculum size
       (C)   By taking the same medium in the bioreactor as that of the shake flask.
       (D)   All of the above