RNA, RNA proteins is what i learned how to do
        
                    
             
        
        
        
HCL is guilty for triggering the release of enzymes such as pepsin which are essential for the digestion of protein. Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.
        
             
        
        
        
ATP has one more phosphate group than ADP
 
        
                    
             
        
        
        
Answer: I hope it helps!! 
Explanation: I can't really explain on computer through a keyboard and stuff lol, but it's worked out. Please let me know if it's wrong :-)
 
        
             
        
        
        
Necessary????????????????????????