Which monosaccharide is an essential component of ATP?

Ribose 

The monosaccharide, ribose is an essential component of adenosine triphosphate (ATP). A part of the chemical energy obtained by oxidation of biomolecules such as carbohydrates, lipids, etc. is stored in the cells in the form of ATP which, in turn, carries out all the cellular functions. That is why ATP is known as the energy currency of the cell.