Gloves to protect against infections, blood
Respiratory masks for breathing while in a room that is called an isolation room. 
Surgical booties while in OR, to cover shoes.
Scrubs to protect from saliva 
        
             
        
        
        
Low to high concentration
        
             
        
        
        
Answer:
C. 
Explanation:
It's a single strand of circular DNA found in the central area of the cell, which is not surrounded by a nuclear membrane. 
 
        
             
        
        
        
A 16% probability of you rolling it