NucWhole250.jpg (24488 bytes)
Another example of a plant nucleus. This nucleus contains a lot of Heterochromatin. This indicates that a small amount of RNA synthesis is occurring. (U of Wis.)


TEM image of a nucleolus. Its borders are "fenestrated". Fenestra refers to windows. This indicates that RNA synthesis is probably occurring.

 Nuc2XMembNolus250.jpg (25301 bytes)
Another dark Nucleolus. Note the Nuclear Envelope in the upper left-hand corner. It is composed of two "unit" membranes. This nucleus has a lot of Euchromatin.
(U of Wis)

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