Synthesis on RER and Free Ribosomes

No actually, proteins that are formed from free ribosomes are released into the cytosol and used within the cell. Conversely, when a ribosome begins to synthesize proteins that are needed in some organelles, the ribosome making this protein becomes "membrane-bound" to the rough endoplasmic reticulum. The newly produced polypeptide chains are inserted directly into the endoplasmic reticulum by the ribosome and are then transported to their destinations, through the secretory pathway. Bound ribosomes usually produce proteins that are used within the plasma membrane or are expelled from the cell via exocytosis. That said, it will be easy to distinguish which one is which; so for each one, find out where it's located and you'll know which one to choose. If you need further assistance, reply back!