What are some examples of the energetic function of organic molecules?
As they are complex molecules, presenting lots of chemical bonds, organic molecules keeps large amount of energy.
Glucose, for example, is the major energy source for the formation of ATP (adenosine triphosphate), a molecule that is essential in several metabolic reactions. ATP is an organic molecule too and is itself the energy source for many biochemical reactions. Fat, proteins and some types of organic polymers, such as starch and glycogen, that are polymers of glucose, are energy reservoirs for the organism.