What structure stores DNA and genetic information for the cell?
DNA itself is storehouse of genetic information. In prokaryotes DNA remains naked and it lies in protoplasm but in eukaryotes DNA is highly packed and stored away from cytoplasm.
In prokaryotes, genetic DNA is circular, located in a region of cell called Nucleoid , the area is not partitioned from surrounding protoplasm. Some small circular DNA called plasmids may sometimes be present in prokaryotic cells.
In eukaryotic cells, more than one DNA molecule is present. Eukaryotic DNA is linear, associated with histone proteins and in packed condition form chromosome. Chromosomes are stored within double membrane bound organelle called the Nucleus .
Other double membrane bound eukaryotic organelles like mitochondria and plastids also store prokaryotic type circular DNA.