# Question #86e08

Aug 30, 2015

${O}_{2}$ is not a bio molecule as it is not having any carbon and hydrogen molecules.
Even though you will say that for release of energy ${O}_{2}$ must be present. but it requires fuel to be burnt ${O}_{2}$ itself will not burn everything around it it requires fire and then fuel to burn the item.
Fuel is usually carbon and hydrogen made source which is oxidized in presence of ${O}_{2}$. now you an see that the ${O}_{2}$ is not a biomolecule as it does not contribute to any structural feature or production of energy on its own.
Check this video which describes what happens if you provide fire to liquid ${O}_{2}$