Protons are located C) in the nucleus with neutrons. Hope this helps!
        
                    
             
        
        
        
Mitosis determines the traits presented in the cluster of cells. 
        
             
        
        
        
Answer:
The plasma membrane is selectively permeable 
Explanation:
hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.