ATP can be hydrolyzed in two ways: the removal of terminal phosphate to form adenosine diphosphate (ADP) and inorganic phosphate, or the removal of a terminal diphosphate to yield adenosine monophosphate (AMP) and pyrophosphate.
Driving with failing or broken struts is dangerous because they do not sufficiently dampen side-to-side and front-to-back weight transfers.
Driving with a missing wheel bearing is dangerous, so if you experience any of the signs above, contact a mechanic as soon as possible. Do not drive with a bad wheel bearing or a wheel bearing that's missing. The wheel bearing is an essential part of your vehicle that helps keep the wheel on. Don't put yourself or others at risk - have the wheel bearing replaced as soon as possible.