It is because Prokaryotic cells has a unicellular structure compared to Eukaryotic cells which has a Multicellular structure.
        
             
        
        
        
2. Ionophores because they are class of proteins that move cell membranes. They are small, hydrophobic molecules that increase a cell's permeability to certain ions.  
        
             
        
        
        
I think it is D but I'm not sure, however, 4 seems pretty right.
        
                    
             
        
        
        
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