Nucleus
![Picture](/uploads/8/9/2/6/8926305/576768448.png)
The nucleus is located in the center of the cell. The nucleus is in all eukaryotic cells. It contains the nucleolus and DNA that is later assembled into Chromosomes. The nucleus controls many of the functions of a cell. It stores hereditary information on its DNA and it is a place where RNA is copied from DNA.
Sources : http://scienceaid.co.uk/biology/cell/images/nucleus.png
http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Diagram_human_cell_nucleus.svg/462px-Diagram_human_cell_nucleus.svg.png
http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Diagram_human_cell_nucleus.svg/462px-Diagram_human_cell_nucleus.svg.png