What is meant by the term “polar” molecule?

Basic Chemistry For Biology Read more from
Chapter Basics of Biology

Polar molecules have opposite charges at either end. “Polar” refers to the positive and negative sides of the molecule. If a molecule is polar, it will be attracted to other polar molecules; for example, water is a polar molecule. This can affect a wide range of chemical interactions, including whether a substance will dissolve in water, the shape of a protein, and even the complex structure of DNA.


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