Nonpolar

Definition

Nonpolar molecules have no separation of charge, so no positive or negative poles are formed. They are typically hydrophobic and do not mix well with water.

5 Must Know Facts For Your Next Test

1. Nonpolar molecules play a key role in the structure of cell membranes due to their hydrophobic nature.
2. Lipids often contain long nonpolar hydrocarbon chains or rings, making them water-insoluble.
3. Nonpolar lipids include fats, oils, and waxes that store energy and provide insulation.
4. The nonpolar tails of phospholipids form the interior of lipid bilayers, crucial for membrane integrity.
5. Nonpolar interactions between lipid molecules drive the formation of micelles and bilayers in aqueous environments.

Review Questions

• What characteristic makes a molecule nonpolar?
• Why are nonpolar molecules important in the structure of cell membranes?
• How do nonpolar interactions contribute to the formation of lipid bilayers?

Related terms

Hydrophobic: Substances that repel water or do not dissolve in it.

Lipid Bilayer: A double-layered arrangement of phospholipids that forms the basic structure of cell membranes.

Phospholipid: A type of lipid molecule that is a major component of cell membranes, containing both hydrophilic and hydrophobic regions.