Biochemical sugar is a term used to describe a type of sugar molecule that is found in living organisms. Ribose is a six-letter biochemical sugar that is an important component of RNA and ATP molecules. It is a pentose sugar, meaning it has five carbon atoms, and is found in all living cells. Ribose is also a key component of ribonucleic acid (RNA), which is responsible for carrying genetic information from DNA to the rest of the cell.