Fungi are eukaryotic organisms that comprise one of the kingdoms of life. Most fungi are multicellular. As eukaryotic organisms, fungi possess cells with organelles, which are structures surrounded by membranes.
Eukaryotic cells arose from prokaryotic cells and have a more complex organization than prokaryotic cells. Much of the activity of prokaryotic cells takes place in the cytoplasm. The activities in eukaryotic cells happen in enclosed structures called organelles. The DNA of eukaryotic cells is contained within their nuclei, whereas the genetic material of prokaryotes floats around in the cytoplasm. Some of the membrane-bound organelles found in fungi include nuclei, mitochondria, Golgi bodies and ribosomes.