Answer:
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Hydrogen ions play a central role in the lives of cells. For example, changes in hydrogen ion concentration are intimately tied to the charge of side chains in proteins. This charge state, in turn, affects the activity of enzymes as well as their folding and even localization. Further, the famed ATP synthases that churn out the ATPs that power many cellular processes are driven by gradients in hydrogen ions across membranes.
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Explanation:
 
        
             
        
        
        
to a scientist and asked him for his secret formula but he said I had to do the ravioli dance first before I got to see it and I made a fool of myself and died that morning 
 
        
             
        
        
        
Answer:
Oil
Explanation:
Oil is the most common fossil fuel internationally, seeing as it is in the top spot for usefulness.  
 
        
             
        
        
        
The answer is D) carbon forms both single and double bonds.