Most reactive free radical

# Out of the various free radical species, the following radical is most reactive:
A. Super oxide (O2
B. Hydrogen peroxide (H2O2
C. Hydroxyl (OH-
D. Nitric oxide (NO)

The correct answer is C. Hydroxyl ion.

Important mechanism of cell injury is by damage to DNA, proteins, lipid membranes, and circulating lipids (LDL) by peroxidation caused by oxygen derived free radicals--super oxide anion (O2-), hydroxy radical (OH-), and hydrogen peroxide (H2O2). Hydroxyl ion is most reactive.

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