Biology · Biochemistry - Cell Membranes
Regarding membrane lipids and fluidity, which of the following statements is/are CORRECT? I. Cholesterol increases membrane fluidity at low temperatures and decreases it at high temperatures. II. Phosphatidylserine is predominantly found in the outer leaflet of the plasma membrane and is externalized during apoptosis. III. Cardiolipin is a unique phospholipid with two phosphate groups and four acyl chains, found predominantly in the inner mitochondrial membrane. IV. The presence of cis-double bonds in fatty acid chains lowers the melting temperature of the membrane by preventing tight packing.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1All four statements
- 2I, II and IV only
- 3II, III and IV only
- 4I, III, and IV only✓
Correct answer
I, III, and IV only
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