Why is nascent oxygen supposed to be toxic to aerobic life forms?

Explanation

Nascent oxygen is very reactive and can react with different biomoleculds. Nascent oxygen is a permanent oxidising agent. It is highly reactive and can react readily with different knd of molecules including DNA, proteins present in the cells of aerobic life forms.
It is thus, considered toxic if it reacts with proteins and enzymes, they are degraded and many metabolic pathways may hence be impaired.