Question

Is Fructose a 5 Carbon Sugar?

Answer 1

Fructose is six carbons, forming a hexose.

1. The typical dietary monosaccharides galactose, glucose, and fructose are all sugar reducers.
2. Disaccharides are formed when two monosaccharides join together and can be classified as reducing or non-reducing.
3. Fructose is a glucose isomer and a levorotatory monosaccharide.
4. While fructose is a hexose, it is usually found as a $5-$membered hemiacetal ring ($6$ carbon sugar).
5. Aldose is glucose and galactose, and ketose is fructose.
6. Monosaccharides can be either linear chains or ring-shaped molecules.

Hence, Fructose is not 5 carbon Sugar. It is 6 carbon sugar.