Question

Glucose and fructose are reducing sugars. Sucrose, or table sugar, is a disaccharide consisting of both fructose and glucose. Is sucrose a reducing sugar? Explain.

Name: Problem 18, Chapter 11: Biochemistry
Uploaded: 2020-10-11T17:54:17-08:00
Duration: 1 min 35 s
Channel: Rashmi Gondi
Description: Glucose and fructose are reducing sugars. Sucrose, or table sugar, is a disaccharide consisting of both fructose and glucose. Is sucrose a reducing sugar? Explain.

   Glucose and fructose are reducing sugars. Sucrose, or table sugar, is a disaccharide consisting of both fructose and glucose. Is sucrose a reducing sugar? Explain.

Biochemistry

Jeremy M. Berg, John… 8th Edition

Chapter 11, Problem 18

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Solved by Expert Rashmi Gondi

10/11/2020

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Reducing sugars are capable of reducing Tollens' and Fehling's reagents, while non-reducing sugars cannot. Show more…

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Glucose and fructose are reducing sugars. Sucrose, or table sugar, is a disaccharide consisting of both fructose and glucose. Is sucrose a reducing sugar? Explain.

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Key Concepts

Reducing Sugars

Reducing sugars are carbohydrates that contain a free aldehyde or ketone group, typically on the anomeric carbon in their open-chain form, which makes them capable of acting as reducing agents. This ability allows them to donate electrons to other compounds, such as metal ions in chemical tests, thereby reducing these ions and undergoing oxidation themselves.

Glycosidic Bonds and Acetal Formation

Glycosidic bonds are the covalent links formed between monosaccharide units in disaccharides, oligosaccharides, or polysaccharides. When a glycosidic bond involves the anomeric carbon of a sugar, it forms an acetal, which prevents the sugar from opening into its reactive form. This removal of the free anomeric group renders the sugar unable to act as a reducing agent.

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