Disaccharide: Difference between revisions
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A disaccharide is a [[Carbohydrate|carbohydrate]] [[ | A disaccharide is a [[Carbohydrate|carbohydrate]] [[Polymer|polymer]] composed of two sugar [[Monomers|monomers]] ([[Monosaccharides|monosaccharides]]) which are joined by a [[Glycosidic bond|glycosidic bond]] formed by a [[Condensation reaction|condensation reaction]]. Disaccharides are the simplest forms of polysaccharides. | ||
Examples of disaccharides: | |||
*[[Maltose|Maltose]]: two monomers of alpha-[[Glucose|glucose]] joined by an alpha 1,4 [[Glycosidic bond|glycosidic bond]]. | |||
*[[Lactose|Lactose]]: one [[galactose|galactose]] monomer and one [[glucose|glucose]] molecule joined by a beta 1,4 glycosidic bond. Lactose is the major sugar in milk. | |||
*[[Sucrose|Sucrose]]: one glucose monomer and one [[fructose|fructose]] monomer joined by an alpha 1,2 glycosidic bond. Sucrose is a product of [[photosynthesis|photosynthesis]] in [[plants|plants]]<ref>Molecular Cell Biology 2013 (Seventh Edition) Lodish et al. page 39</ref>. | |||
=== References<br> === | |||
<references /><br> | |||
Latest revision as of 13:33, 30 November 2018
A disaccharide is a carbohydrate polymer composed of two sugar monomers (monosaccharides) which are joined by a glycosidic bond formed by a condensation reaction. Disaccharides are the simplest forms of polysaccharides.
Examples of disaccharides:
- Maltose: two monomers of alpha-glucose joined by an alpha 1,4 glycosidic bond.
- Lactose: one galactose monomer and one glucose molecule joined by a beta 1,4 glycosidic bond. Lactose is the major sugar in milk.
- Sucrose: one glucose monomer and one fructose monomer joined by an alpha 1,2 glycosidic bond. Sucrose is a product of photosynthesis in plants[1].
References
- ↑ Molecular Cell Biology 2013 (Seventh Edition) Lodish et al. page 39