Where is the nucleolus located in the cell? What molecule does the nucleolus produce and what is the function of this molecule?

The nucleolus is located within the nucleus of the cell.  It produces the components for ribosomes, which then move out of the nucleus to produce proteins.  Cells differ in the amount of protein they need to produce.  In cells that have to produce alot of protein, the nucleolus can be as big as a quarter the size of the whole nucleus in order to generate lots of ribosomes.