You are presented with the quiz "What structures are in the cytoplasm where proteins are made?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "ribosomes are structures in the cytoplasm where proteins are made" and "bound and free ribosomes are structurally identical and interchangeable". 

So, what's the best answer to the question?


 

     bound and free      