When ATP is broken apart there is a release of energy, ADP, and a
phosphate. But the cell takes that ADP and the phosphate and puts them
back together to make ATP. Where did the energy to do this come from?

It comes from respiration. Once the ATP is broken down, the ADP and P make their way back to the mitochondria. There, they are once again linked together to make ATP during the steps of cellular respiration.

Remember, cellular respiration does not make ATP from scratch. It simply takes ADP and P which are already there and links them up again. Thus, a cell needs only so much ADP and P. After that, the ADP and P are fused to make ATP, the ATP is then broken down to release energy where it is needed, and the resulting ADP and P are shipped back to the mitochondria to start the process all over again.

Tags: Biology
Last update:
2017-12-14 21:20
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