It is the site of DNA replication, and the site of RNA synthesis. Organelles partition the cell into regions which carry out different cellular functions. Mitochondria, the ER, and lysosomes are examples of organelles. The term plasma membrane is used more frequently when discussing prokaryotes. Eukaryotic DNA is organized into chromosomes.
Prokaryotic cells have no internal membranes or cytoskeleton.
Their DNA is circular, not linear. All the contents of a cell, including the nucleus. They are characteristic of forams . Organelle in ciliates and dinoflagellates which releases long filamentous proteins when the cell is disturbed. Used as a defense against would-be predators.