How do enzymes affect biochemical reactions in the cell?

Redox reactions are coupled oxidation and reduction reactions. 

What accounts for the different chemical bonds between atoms of different elements?                  

What accounts for the different chemical bonds between atoms of different elements?                  

ATP is the energy currency of the cell. 

Which are true about enzymes?

Why are controls needed in scientific studies?  

Why are controls needed in scientific studies?  

The original cell theory includes:                     

Contrast cilia and flagellae.