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.
There are three distinct sites in a ribosome: the A site (aminoacyl-tRNA), where the incoming charged tRNA enters; the P site (peptidyl-tRNA), where the tRNA with the growing peptide chain resides; and the E site, where the tRNA (devoid of its amino acid) exits.