Answer:
most likely d, she's a chemist so she works with chemicals and substances akin to them
 
        
                    
             
        
        
        
I believe <span>a </span>regulatory<span> repressor </span>protein<span> is normally bound to the operator. This prevents the transcription of the genes on the </span>operon<span>.</span>
        
             
        
        
        
Answer:
water is a product 
Explanation:
hydrogen and oxygen are the reactants combining together the make the final product of Water.