BIO NMDCAT BIOLOGICAL MOLECULES

nmdcat.online June 27, 2026

A significant increase in the proportion of unsaturated fatty acids in a phospholipid bilayer would result in

A. Decreased membrane fluidity

B. Increased membrane fluidity

✓

C. Formation of a solid monolayer

D. Inhibition of all membrane transport

📝 Explanation

Unsaturated fatty acids contain kinks due to double bonds, preventing tight packing of the hydrocarbon tails. This increased space between lipids makes the membrane more fluid and permeable compared to a membrane rich in straight-chained saturated fatty acids.

📖 Additional Information

Decreased membrane fluidity
Increased membrane fluidity
Formation of a solid monolayer
Inhibition of all membrane transport

Unsaturated fatty acids contain kinks due to double bonds, preventing tight packing of the hydrocarbon tails. This increased space between lipids makes the membrane more fluid and permeable compared to a membrane rich in straight-chained saturated fatty acids.

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