Carbohydrates- polysaccharides and disaccharides.

Carbohydrates- polysaccharides and disaccharides.

1. Disaccharides

   • Monosaccharides join together to form Polysaccharides.
   • Glucose linked to Glucose ---> Maltose.
   • Glucose linked to Fructose ---> Sucrose
   • Glucose linked to Galactose ---> Lactose
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     • This is a CONDENSATION REACTION.
       • Forms a GLYCOSIDIC BOND
   • When water is added to a Disaccharide it BREAKS the Glycosidic bond
     • Releasing the Monosaccharides that were previously formed.
       • This is Called a HYDROLYSIS REACTION.

2. Polysaccharides

   • Polysaccharides are polymers, formed by combining many monosaccharides
     • The Monosaccharides are joined by Glycosidic bonds which are formed through CONDENSATION REACTIONS.
   • Polysaccharides are very large molecules so are INSOLUBLE.
     • This means that these Polysaccharides are good for storage, or structure , Such as Cellulose.
   • Starch is a Polysaccharide that is formed when between 200 and 100,000 ALPHA Glucose is joined

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