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Disaccharides

OCR AS-level BiologyBiological MoleculesLesson 17 of 63

Two monosaccharides joined together by a covalent bonds is called a disaccharide.

The monosaccharides undergo a condensation reaction with the removal of a water molecule to form the covalent bond.

The bond formed is called a glycosidic bond.

Diagram

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Key terms in this lesson

condensation reaction
A reaction that joins two molecules together with a covalent bond, releasing a water molecule.
hydrolysis
A reaction that breaks a covalent bond between two molecules by adding a water molecule.

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