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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

The involvement of water in the formation of the phospholipid bilayer is based on the

A. Formation of covalent bonds between the phosphate head groups
B. Hydrophilic effect, where water attracts non-polar tails
C. Hydrophobic effect, where water molecules force non-polar tails to aggregate away from the aqueous environment
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D. High heat capacity of water, which stabilizes the structure

📝 Explanation

Water drives membrane formation. The hydrophobic fatty acid tails are excluded from water to minimize the ordering of water molecules. This entropic force causes the tails to aggregate, while the polar heads interact favorably with water, self-assembling into a bilayer.

📖 Additional Information

  • Formation of covalent bonds between the phosphate head groups
  • Hydrophilic effect, where water attracts non-polar tails
  • Hydrophobic effect, where water molecules force non-polar tails to aggregate away from the aqueous environment
  • High heat capacity of water, which stabilizes the structure

Water drives membrane formation. The hydrophobic fatty acid tails are excluded from water to minimize the ordering of water molecules. This entropic force causes the tails to aggregate, while the polar heads interact favorably with water, self-assembling into a bilayer.

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