Question

Why is .OH more dangerous than ${\mathbf{OH}}^{-}$ in an organism?

Short answer

Hydroxyl radicals assault and damage the bio molecules that surround the cell.

Step-by-step solution

Radical

Radical is the species that has a free unpaired electron. Due to the presence of free electron, it attains tremendous reactivity.

Explanation

The hydroxyl radical_{$(.\text{OH})$}, is the neutral form of the hydroxide ion $(-{\text{OH}}^{-})$. Hydroxyl radicals attack essential cell components. The bio molecules surrounding is being damaged since the structures are connected with their functions.

Hence Hydroxyl radicals attack the cell and destroys its surrounding bio molecules.