You are presented with the question "Name one kind of a protein that some viruses have inside their phospholid envelope?" and the following answer choices: 
- layers of fat
 - more abundant
 - positive
 - negative
 - allow growth
 - Leptospirosis
 - intrinsic
 - bioaerosols

Now knowing that some viruses have an envelope of phospholipids and proteins and intrinsic proteins are embedded in the phospholipid, choose the best answer.


 

       intrinsic  