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Topic Cell membrane
Asked 2 times across 2 UPSC exams over 1 years (2021–2022), peaking in 2022.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2022
- Recurs across 2 years (2021–2022)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2021 → CDS 2022
How the concept evolved
Rising — more than half its appearances (2 of 2) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2022
Which one of the following is a feature of Membrane?
- A Bilayer of phospholipid molecule in which proteins and cholesterol are embedded ✓
- B Bilayer of proteins molecule in which lipid and cholesterol are embedded
- C Bilayer of neutral lipid in which proteins and cholesterol are embedded
- D Bilayer of neutral lipid lacking cholesterol and proteins
✓ Correct answer: (A)
Science & Technology › Biology & Health
NDA2021
If human blood is placed in a 2% detergent solution, what will happen to the RBC ?
- A The RBC will shrink.
- B The RBC will swell and become turgid.
- C The RBC will swell and burst.
- D The RBC will lyse. ✓
✓ Correct answer: (D)
Science & Technology › Biology & Health
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