How we differ glucose and fructose by visible reaction?
Answers
Answer:
Carbohydrate is an essential macromolecule to all living creatures in the world and it can be divided into three categories. They are monosaccharides, disaccharides, and polysaccharides. Glucose and fructose are considered as simple and the most abundant monosaccharides in the world. However, there seems to be a lot of confusion over the difference between glucose and fructose because they have a similar formula: C6H12O6. Both fructose and glucose are considered as simple reducing sugars and are absorbed directly into the bloodstream during digestion. However, glucose is an aldo sugar whereas fructose is a simple keto sugar. Fructose is used commercially in foods and beverage industries because of its low cost and high sweetness compared to glucose. This is the main difference between glucose and fructose. In this article, let’s elaborate the difference between glucose and fructose in terms of their intended uses as well as chemical and physical properties.
What is Glucose
The word glucose is derived from Greek and literally means “sweet wine”; it is also known as grape sugar. Its molecular formula is C6H12O6. The D-glucose is the most predominant isomer in nature compared to L-glucose. It is the major output of the photosynthesis process where water and carbon dioxide are used to produce glucose by plant chlorophylls pigments in the presence of sunlight. In addition, glucose is the main energy releasing compound in cellular respiration and it is more or less similar to the reverse of the photosynthesis reaction. Glucose is also used to synthesize some disaccharides and polysaccharides. It is used to synthesize starch in plant and glycogen in animals. In addition, it can be obtained by the hydrolysis of carbohydrates including table sugar (sucrose), maltose, cellulose, glycogen etc.

What is Fructose
Fructose is a simple keto sugar and it is also known as fruit sugar because it is mainly found in many plants. Its molecular formula is C6H12O6. The D-fructose is the most predominant isomer in nature compared to L-fructose. It is the most reactive and most water soluble sugar compared to other natural sugars. It can be isolated from honey, tree and vine fruits, flowers, berries, and root vegetables. However, industrially fructose is produced from sugar cane, sugar beets, and corn. Fructose is mainly important for beverage industries and bakery products because it contributes to enhancing palatability and taste, and for browning or color development.

Difference Between Glucose and Fructose
The differences between glucose and fructose can be divided into following categories. They are;
History
Glucose was first described by the German chemist Andreas Marggraf in 1747. However, it was largely investigated by Emil Fischer.
Fructose was first introduced by French chemist Augustin-Pierre Dubrunfaut in 1847.
Natural Sources
Glucose is rarely stored in plants or animals because it is highly reactive. But glucose is the building block for starch (storage compound of plants), glycogen (storage compound of animals), cellulose (in cell wall), sucrose (in nectar, plant derived treacle), and lactose (in milk).
Fructose is found in honey, tree and vine fruits, flowers, berries, and most root vegetables.
Alternative Names
Glucose is also known as Blood sugar, Dextrose, Corn sugar, D-Glucose, Grape sugar.