The most characteristic feature of a eukaryotic cell, the nucleus, consists of a [[nucleoplasm]] surrounded by a double nuclear membrane pierced by nuclear pores. <ref>http://biotech.icmb.utexas.edu/search/dict-search.html</ref><ref>http://www.iscid.org/encyclopedia/Eukaryote</ref> The nucleoplasm contains the (linear) chromosomes of the cell, which are organised into heterochromatin, which stains only a little, and euchromatin, which stains more densely. The most important euchromatic area is the nucleolus, in which ribosomes are formed. | The most characteristic feature of a eukaryotic cell, the nucleus, consists of a [[nucleoplasm]] surrounded by a double nuclear membrane pierced by nuclear pores. <ref>http://biotech.icmb.utexas.edu/search/dict-search.html</ref><ref>http://www.iscid.org/encyclopedia/Eukaryote</ref> The nucleoplasm contains the (linear) chromosomes of the cell, which are organised into heterochromatin, which stains only a little, and euchromatin, which stains more densely. The most important euchromatic area is the nucleolus, in which ribosomes are formed. |