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Grade: 12th pass
        How will you convert glucose into frutose and vice versa
2 years ago

Answers : (1)

Arun
23751 Points
							

Isomerization of glucose to fructose First, an understanding of the forms of glucose and fructose is needed. This isomerization converts glucose which is not very sweet to fructose, the most sweet of the natural sugars. Syrups from this process compete with sucrose (cane sugar) in many food applications. Almost all manufacturers of soft drinks use high fructose syrups because they are less expensive than sucrose. This was devastating to world prices of cane sugar and crippled the economies of some countries.The isomerization of glucose to fructose is part of the “glycolysis” cycle that converts glucose to pyruvate. The way this is done is to isomerize the aldehyde (hemiacetal) glucose to the ketone (as a hemiacetal) fructose,and make another phosphate ester. The isomerization takes advantage of the ease of breakage of a C-H bond which involves a carbon next to a carbonyl carbon. This is important in the next step which cleaves the bond between carbons three and four of fructose. It is noted that this bond involves the carbon next to the carbonyl carbon of fructose. This cleavage would not have been possible without the isomerization of glucose to fructose, because the carbonyl group of glucose is too far from carbons three and four to make that bond breakable.

To convert pyruvate to glucose, the cells use a process called "gluconeogenesis," explain Campbell and Farrell. This involves the use of many different enzymes, and ultimately takes place through a series of many steps and chemical transformations. Glucose generated by gluconeogenesis is indistinguishable chemically from glucose ingested in the form of sugar or starch, and the cells can use it in the same ways: It can either be burned for immediate energy or stored, though conditions requiring glucose generation would likely necessitate immediate burning of the.In this way fructose also changes to glucose by the reverse process of glycolysis (gluconeogenesis).

2 years ago
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