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Question

Is Fructose a 5 Carbon Sugar?


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Solution

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.


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