Where can site of protein synthesis be attached to?

by Alex
(Jesse Bethel California )

My biology teacher isn't a very good one, and he said all the answers are in the book, but they are not. So the question is, where can site of protein synthesis be attached? And I have no clue what this is or where it can be attached to.

A: Read our review on Protein Synthesis. You may be referring to ribosomes, which can be found attached to the rough endoplasmic reticulum.