The ribosome is the protein synthesizer or protein builder of the cell. Ribosomes can be found on rough endoplasmic reticulum or free flowing throughout the cell.
http://www.biology4kids.com/files/cell_ribos.html
http://www.thefreedictionary.com/ribosome
http://www.biology4kids.com/files/cell_ribos.html
http://www.thefreedictionary.com/ribosome