Content-Type: text/html Wikipedia: Nucleus

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Meaning "center", in chemistry and physics, the term used to describe that collection of protons and neutrons in the center of an atom that carry the bulk of the atoms mass and positive charge.

In biology, "nucleus" refers to the membrane-bounded subcellular organelle found in eukaryotes, visible via microscopy, which contains, primarily, the cell's chromosomes.


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Last edited July 27, 2001 8:07 am (diff)
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