The cell nucleus includes all of the cell's genome, besides for a small fraction of mitochondrial DNA, prepared as a couple of long linear DNA molecules in a complex with a big kind of proteins, which includes histones, to form chromosomes. The genes within these chromosomes are dependent in this sort of manner to sell cellular feature. The nucleus maintains the integrity of genes and controls the activities of the mobile by using regulating gene expression—the nucleus is, therefore, the control middle of the cell. the primary systems making up the nucleus are the nuclear envelope, a double membrane that encloses the complete organelle and isolates its contents from the cellular cytoplasm, and the nuclear matrix (which includes the nuclear lamina), a network in the nucleus that adds mechanical support, just like the cytoskeleton, which supports the cell as a whole.