You are presented with the question "How do proteins leave the ER?" and the following answer choices: 
- aqueous solution
 - it's state
 - Veins and arteries.
 - Move to another area
 - allow growth
 - active transport
 - It expands
 - movement

Now knowing that vesicle transport requires energy, so it is also a form of active transport and proteins leave the ER in transport vesicles 5, choose the best answer.


 

      active transport   