I was think about buying a 1999-2005 Silver Pf69 Ultra Cameo State Quarters in either Pcgs or Ngc. I was wondering what grading service is the best out of...
There are two different locations where ribosomes can be found in a  cell. These two locations are suspended in the cytosol and attached  to the endoplasmic reticulum.
In eukaryotes, ribosomes float in the cytosol of a cell or bind to the endoplasmic reticulum (ER), ribbon-like structures found within the cell. Ribosomes are composed of two rRNA subunits and other catalytic proteins. They are quite small, only a few hundred nanometers across.