You are presented with the question "Where are the structures where proteins are made located on?" and the following answer choices: 
- epidermis and dermis
 - Something that makes plants green
 - The area was once underwater
 - Veins and arteries.
 - rough endoplasmic reticulum
 - sub-units of species
 - Earth orbiting the Sun
 - the body's largest organ

Now knowing that ribosomes are structures in the cytoplasm where proteins are made and rough endoplasmic reticulum has ribosomes attached d, choose the best answer.


 

     rough endoplasmic reticulum    