I think you're talking about histones. Histones are proteins found in eukayotic cell nuclei. Histones are what DNA wrap around so it fits inside the nucleus and helps with the formation of chromosomes.
        
             
        
        
        
If denaturation occurs (extreme temperature change or pH changes), the enzyme will not be reusable! The structure of the enzymes are not changed. As a result of this, enzymes will be used again and again to bind onto another substrate molecule and catalyze the reaction once again.
 
        
             
        
        
        
Answer: The Answer is A.) Burning of fossil fuels
Explanation:
 
        
                    
             
        
        
        
Answer:
I think it is grass_ tiger _human being