A eukaryotic cell is any cell with a true nucleus and organelles. The nucleus contains the majority of the cell’s DNA and is the genetic hub of the cell. Organelles are membrane bound structures found inside eukaryotic cells and they play a similar role to the organs of the body.Organelles perform certain roles to help the cell function more efficiently.he organelles and nucleus float in the cytoplasm of a cell. Ribosomes – produce proteins. Ribosomes are not true organelles because they are not enclosed in a membrane. Ribosomes can also be found in prokaryotic cells.