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Test for Reducing Sugars

AQA AS-level BiologyBiological MoleculesLesson 7 of 29

Monosaccharides such as glucose, fructose and galactose can donate electrons to other compounds.

Molecules that can donate electrons are called reducing agents.

Benedict's reagent is an alkaline solution of copper(II) sulfate. Copper(II) sulfate can be reduced to insoluble copper(I) oxide which has an orange-red colour.

Diagram

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Key terms in this lesson

monosaccharide
The monomer from which larger carbohydrates are made, a simple sugar such as glucose.

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All 29 lessons in Biological Molecules · All AQA AS-level Biology topics