Yeah, that's pretty much the question.....10 points to best.
Hmmm, this is like asking how having a power cable be used to run a TV. A tv can't run without it. It's there are a lot of other things/factors/processes that enable the tv to run, but the power cord is still mandatory. Likewise for atp/adp recycling. It's not really used to run the machinery. It's a mandatory part of the metabolism of a cell. When ATP us used, energy is released from the ATP molecule. The byproducts of the reaction are reused. You can sort of think of them as rechargeable batteries.
