Answer:
We may not know all the ways, but some are known.
Tears in the plama membrane are self-healing due to the self organizing behavior of its phospholipid bilayer.
Various DNA repair mechanisms, including homologous recombination restore damaged parts.
Most proteins degrade, and bind to ubquitin, which provides a handle to carry it to systems that can dispose of it (the process is called ubiquitinization.)
In many cells, a signal may tell cell to die (apoptosis) if the cell seems too irregular.
Explanation:
