molecule


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(moll-I-kyul) A chemical made up of two or more atoms. The atoms in a molecule can be the same (an oxygen molecule has two oxygen atoms) or different (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules, such as proteins and DNA, can be made up of many thousands of atoms.
Weiss_marisa_tcm8-329674

Audio contributed by: Marisa Weiss, M.D.

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