- Glycogen – is the form in which animals (including humans) store energy – in the liver and muscles in the body; - Starch – is the form in which plants store energy – as in grains, pulses, potatoes and root vegetables. The chemical formula for each of these is (C6H10O5)n – i.e. multiples of 6 carbon, 10 hydrogen and 5 oxygen combinations bonded together.
