Unlike prokaryotic cells, all eukaryotic cells have nuclei. Nuclei house most of a cell’s genetic information – much of it in the form of DNA – making a nucleus a sort of blueprint for building future ...

Images of the model plant Arabidopsis thaliana. In the plant on the right, the activity of the protein-RNA complex "U1 snRNP" was artificially reduced. The plants are 21 days old.