CSIR NET Life Science Unit 12 MCQs with Answers

Here below are 15 core Biochemical Engineering topics across five parts. Choose Easy, Medium or Difficult for each topic to practise 15 questions per level. Answers show the correct option and explanation immediately.

Part 1: Topics 1–3

1. Bioprocess Engineering Fundamentals

15 questions per difficulty level · Select a level

2. Microbial Growth Kinetics

15 questions per difficulty level · Select a level

3. Substrate Utilization and Yield

15 questions per difficulty level · Select a level

Part 2: Topics 4–6

4. Bioreactor Design and Types

15 questions per difficulty level · Select a level

5. Sterilization and Aseptic Operation

15 questions per difficulty level · Select a level

6. Aeration and Oxygen Transfer

15 questions per difficulty level · Select a level

Part 3: Topics 7–9

7. Mixing and Scale-Up

15 questions per difficulty level · Select a level

8. Bioprocess Monitoring and Control

15 questions per difficulty level · Select a level

9. Enzyme Kinetics and Immobilization

15 questions per difficulty level · Select a level

Part 4: Topics 10–12

10. Fermentation Products and Pathways

15 questions per difficulty level · Select a level

11. Downstream Separation Processes

15 questions per difficulty level · Select a level

12. Product Purification and Formulation

15 questions per difficulty level · Select a level

Part 5: Topics 13–15

13. Bioprocess Economics and Optimization

15 questions per difficulty level · Select a level

14. Waste Treatment and Environmental Bioprocesses

15 questions per difficulty level · Select a level

15. Bioprocess Quality and Regulatory Concepts

15 questions per difficulty level · Select a level

Frequently Asked Questions

What is the difference between batch and continuous fermentation?

Batch culture begins with a fixed medium charge; continuous culture adds fresh medium and removes culture during operation.

What is the dilution rate in a chemostat?

Dilution rate is the volumetric medium flow rate divided by the working culture volume.

Why is oxygen transfer important in aerobic bioreactors?

Insufficient oxygen transfer can limit microbial respiration, growth and product formation.

What is downstream processing?

It includes separation, recovery and purification of a desired product after or during bioprocessing.

How is product yield different from productivity?

Yield relates product formed to substrate or biomass used; productivity expresses product formed per unit time, often per unit volume.

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