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.
Well, there are membrane-bound ribosomes that are found along the endoplasmic reticulum (ER). This is specifically called rough endoplasmic reticulum. And there are free ribosomes which can be found floating in the cytosol. There are probably other locations too.