CSIR NET Life Science Unit 2 MCQs with Answers

Here below are 15 core Cellular Organization 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 1Part 2Part 3Part 4Part 5

Part 1: Topics 1–3

1. Cell Theory, Prokaryotic and Eukaryotic Cells

15 questions per difficulty level · Select a level to start

2. Plasma Membrane Structure and Function

15 questions per difficulty level · Select a level to start

3. Membrane Transport and Ion Channels

15 questions per difficulty level · Select a level to start

Part 2: Topics 4–6

4. Cell Wall and Extracellular Matrix

15 questions per difficulty level · Select a level to start

5. Nucleus, Chromatin and Chromosome Organization

15 questions per difficulty level · Select a level to start

6. Mitochondria and Chloroplasts

15 questions per difficulty level · Select a level to start

Part 3: Topics 7–9

7. Endoplasmic Reticulum and Golgi Apparatus

15 questions per difficulty level · Select a level to start

8. Lysosomes, Peroxisomes and Vacuoles

15 questions per difficulty level · Select a level to start

9. Cytoskeleton: Microtubules, Microfilaments and Intermediate Filaments

15 questions per difficulty level · Select a level to start

Part 4: Topics 10–12

10. Cell Junctions and Cell Adhesion

15 questions per difficulty level · Select a level to start

11. Protein Sorting and Intracellular Trafficking

15 questions per difficulty level · Select a level to start

12. Cell Cycle and Its Regulation

15 questions per difficulty level · Select a level to start

Part 5: Topics 13–15

13. Mitosis and Meiosis

15 questions per difficulty level · Select a level to start

14. Cell Cycle Checkpoints and Apoptosis

15 questions per difficulty level · Select a level to start

15. Microbial Cell Organization and Growth

15 questions per difficulty level · Select a level to start

How to use these MCQs

Start with Easy questions to check terminology, use Medium questions for concept recognition, and Difficult questions to practice distinguishing related biological mechanisms. The question sets revisit the same 15 core concepts per topic from different prompts, so this is a foundational revision bank rather than 675 independent syllabus concepts.

Frequently Asked Questions

What distinguishes prokaryotic cells from eukaryotic cells?

Prokaryotes lack a membrane-bound nucleus; eukaryotes enclose most genomic DNA within a nucleus.

How are proteins targeted to the endoplasmic reticulum?

Many secretory proteins carry an N-terminal signal sequence recognized by signal recognition particle during translation.

What is the role of the Golgi apparatus?

It modifies, sorts and distributes proteins and lipids arriving from the secretory pathway.

How do microtubules differ from microfilaments?

Microtubules consist of tubulin and support transport and spindle organization; microfilaments consist of actin and support cell shape and movement.

What is the purpose of the G1/S checkpoint?

It helps prevent entry into DNA replication when growth conditions or genome integrity are unsuitable.

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