have much more complex structures than prokaryotic cells. all E cells contain many diffferent kidnsn of membrane bound structures called organeslls suspended in the cytoplasm. These organelles include nucleus with a clearly defined membrane calle d a nuclear membrane/envelope. DNA of a E cell is located in nucleus. organisms that are made of e cells are eukaryotes and include all animals, plants, fungi and protists athe single celled organisms. although a nucleus is usually vivisble with a light microscope, many organelles are visible only with electron microscopes.