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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 192 of 200

Q192
General ScienceBiology
Which component is absent in animal cell membrane?
  1. a.Cholesterol
  2. b.Ergosterol
  3. c.Phospholipid
  4. d.Oligosaccharide

Answer: (B) Ergosterol

Ergosterol is the sterol of fungal cell membranes (and the target of antifungal drugs); animal membranes use cholesterol instead. Phospholipids form the bilayer, and oligosaccharides attached to lipids and proteins form the cell coat, so both are present in animal membranes.