see wikipedia (http://en.wikipedia.org/wiki/Ribose) where they state
“Ribose is an organic compound with the formula C5H10O5; specifically, a monosaccharide (simple sugar) with linear form H−(C=O)−(CHOH)4−H, which has all the hydroxyl groups on the same side in the Fischer projection.”
=== me ===
Ribose is used by those suffering from Chronic Fatigue Syndrome to boost their energy. Ribose is a precursor to ATP.
How is ribose metabolized? See (http://nashua.case.edu/PathwaysBiocyc/Web/?viewID=5f1d491c-b24a-4988-af1a-201164ea2240&pwgid=01a8c4ee-8f08-45cc-ba1c-258ab2a6964c&terms=&type=Contains&page=1) for details.