BIO NMDCAT BIOLOGICAL MOLECULES

nmdcat.online June 27, 2026

The function of cholesterol in animal cell membranes includes

A. Acting as a primary source of metabolic energy

B. Modulating membrane fluidity and stability

✓

C. Catalyzing the synthesis of phospholipids

D. Transporting ions against their concentration gradient

📝 Explanation

Cholesterol is a sterol lipid that intercalates between phospholipids. At high temperatures, it restrains movement, reducing fluidity. At low temperatures, it prevents tight packing, preventing solidification. Thus, it acts as a key fluidity buffer for membrane stability.

📖 Additional Information

Acting as a primary source of metabolic energy
Modulating membrane fluidity and stability
Catalyzing the synthesis of phospholipids
Transporting ions against their concentration gradient

Cholesterol is a sterol lipid that intercalates between phospholipids. At high temperatures, it restrains movement, reducing fluidity. At low temperatures, it prevents tight packing, preventing solidification. Thus, it acts as a key fluidity buffer for membrane stability.

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