ATP and derivatives of Coenzyme A (acetyl-CoA is one of many) are short term storage molecules. ATP is the most important energy-rich phosphate compound. Coenzyme A derivatives are important short term storage for anaerobic organisms, particularly those that rely on fermentation.
At In-N-Out, why do animal style fries cost more than double the price of regular fries? As of January 2012, regular fries are $1.50 and animal style fries are $3.40.
The average size of an animal cell is ~10 to 50 microns (a micron is 10^-6 meter). A cheek cell would fall apx. in that range, probably 30-50 microns. Cell size varies greatly in multi-cellular animal cells, though--the egg cell size of some animals is quite a bit larger--think of an ostrich egg, which is a single cell.