Phosphorus Cycle Phosphorus is the key to energy in living organisms, for it is phosphorus that moves energy from ATP to another molecule, driving an enzymatic reaction, or cellular transport. Phosphorus is also the glue that holds DNA together, binding deoxyribose sugars together, forming the backbone of the DNA molecule. Phosphorus does the same job in RNA. Again, the keystone of getting phosphorus into trophic systems are plants. Plants absorb phosphorous from water and soil into their…