Can you be a little more specific? Are you asking if alcohol plays a role in a scientific way? or as far as flavoring...
As far as baking and pastries (i'm not a pastry chef) Alcohol is a primary flavoring medium. since it is already a fermented end product it will effect food in that manner.
If you can shed a bit of light on your studies perhaps we can be of more assistence :)
Baruch ben Rueven / Chanaבראד, ילד של ריימונד והאלאן