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United States Department of Agriculture

Agricultural Research Service

Molecular biologist

Photo: 3 biologists examine moleculesA biologist studies living things, like plants and animals and microorganisms.

Biologists examine the whats, wheres, whens, whys and hows of these creatures. Ditto, for their requirements to stay alive-and-kicking and make seeds or eggs or whatever else it takes to produce a new generation.

Animation: Twirling DNA moleculeMolecular biologists study the size, shape, function and other properties of molecules like DNA (deoxyribonucleic acid)--an organism's genetic code book--and important substances like protein.

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Last Modified: 2/14/2011
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