NUCLEUS IS KNOWN AS THE BRAIN OF THE CELL

NUCLEUS

NUCLEUS IS KNOWN AS THE CONTROL CENTER OF THE THE BRAIN

NUCLEUS contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes.The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating the cell's activities — the nucleus is, therefore,  called the control center or the brain of the cell. 

The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nucleo skeleton , a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.