Since they are [?] molecules,
presenting many bonds,
organic molecules store large amount of
energy.

[?], for example, is the main
energy source for the formation of
(adenosine triphosphate), a molecule
that is necessary in several metabolic
reactions. ATP is an organic molecule
too and is itself the energy source for
many bio reactions. Fat,
proteins and some types oforganic
polymers, like [?] and glycogen, that
are polymers of glucose, are energy
reservoirs for the organism.