Fact 1: Ribosomes are structures in the cytoplasm where proteins are made.

Fact 2: Bound and free ribosomes are structurally identical and interchangeable.

Given the two facts above, answer the question "What structures are in the cytoplasm where proteins are made?" with the following options: 
- layers of fat
 - important habitats
 - Veins and arteries.
 - bioaerosols
 - bound and free
 - sensory neurons
 - a cuticle
 - a delta


 

     bound and free    