Eukaryote cells are very complex structures with a nucleus which is bound by a double membrane. The cytoplasm in a eukaryote cells is filled with a range of complex structures, called organelles. Many of these are also enclosed by their own membrane.
Both eukaryotic and prokaryotic cells contain DNA, although prokaryote DNA has no proteins, called histones, which are associated with it and, therefore, does not form into chromosomes. The DNA is a prokaryote cell in linear. The DNA in a eukaryote cell is circular.
Prokaryote cells do not have a nucleus.