Polysaccharide

From The School of Biomedical Sciences Wiki
(Difference between revisions)
Jump to: navigation, search
 
(3 intermediate revisions by 2 users not shown)
Line 1: Line 1:
Polysaccharides are formed by joining [[Monosaccharides|monosaccharides]] into polymeric carbohydrate structures. These [[Monosaccharide|monosaccharides are]] linked with [[Glycosidic bonds|glycosidic bonds]]. Polysaccharides have two main forms and uses: structural and storage. Important examples of these are [[Starch|starch]] and [[Glycogen|glycogen]] (storage), and [[Cellulose|cellulose]] and [[Chitin|chitin]] (structural). Polysaccharides must be more than about&nbsp;ten monosaccharides in length but have no real limit to their length, with some examples consisting of&nbsp;hundreds of sugar units. There is however a general formula that can be used to show the construction of the polysaccharide. As most polysacchardies are formed using a backbone of six-carbon [[Monosaccharides|monosaccharides]], the general formula is (C<sub>6</sub>H<sub>10</sub>O<sub>5</sub>)n, where n is the unknown number and therefore the length of the chain&nbsp;<ref>Champe PC, Harvey RA, Ferrier DR. (2008)Biochemistry, 4th edition; Philadelphia; Lippincott Williams &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Wilkins</ref>.  
+
Polysaccharides are formed by joining [[Monosaccharides|monosaccharides]] into polymeric carbohydrate structures. These [[Monosaccharide|monosaccharides are]] linked with [[Glycosidic bonds|glycosidic bonds]]. Polysaccharides have two main forms and use: structural and storage. Important examples of these are [[Starch|starch]] and [[Glycogen|glycogen]] (storage), and [[Cellulose|cellulose]] and [[Chitin|chitin]] (structural). Polysaccharides must be more than about ten monosaccharides in length but have no real limit to their length, with some examples consisting of hundreds of sugar units. There is, however, a general formula that can be used to show the construction of the polysaccharide. As most polysaccharides are formed using a backbone of six-carbon [[Monosaccharides|monosaccharides]], the general formula is (C<sub>6</sub>H<sub>10</sub>O<sub>5</sub>)n, where n is the unknown number and therefore the length of the chain<ref>Champe PC, Harvey RA, Ferrier DR. (2008)Biochemistry, 4th edition; Philadelphia; Lippincott Williams and Wilkins</ref>.  
  
Both starch and glycogen are polysaccharides of glucose. The glucose molecules in starch and glycogen are linked by α-1,4-glycosidic bond and α1,6-glycosidic bonds.<br>Starch is mainly used as the energy store in plants. It is stored in the form of tubers, fruits and seeds.<br>Glycogen is the main energy store in humans.  
+
Both starch and glycogen are polysaccharides of glucose. The glucose molecules in starch and glycogen are linked by α-1,4-glycosidic bond and α1,6-glycosidic bonds. Starch is mainly used as the energy store in plants. It is stored in the form of tubers, fruits and seeds. Glycogen is the main energy store in humans.  
  
<br>  
+
Glycosidic bonds are formed during condensation reactions. A small molecule, usually water, is released as a side product<ref>https://www.dictionary.com/browse/condensation</ref>.
  
 
=== References  ===
 
=== References  ===
  
<references />&nbsp;
+
<references />

Latest revision as of 16:42, 7 December 2018

Polysaccharides are formed by joining monosaccharides into polymeric carbohydrate structures. These monosaccharides are linked with glycosidic bonds. Polysaccharides have two main forms and use: structural and storage. Important examples of these are starch and glycogen (storage), and cellulose and chitin (structural). Polysaccharides must be more than about ten monosaccharides in length but have no real limit to their length, with some examples consisting of hundreds of sugar units. There is, however, a general formula that can be used to show the construction of the polysaccharide. As most polysaccharides are formed using a backbone of six-carbon monosaccharides, the general formula is (C6H10O5)n, where n is the unknown number and therefore the length of the chain[1].

Both starch and glycogen are polysaccharides of glucose. The glucose molecules in starch and glycogen are linked by α-1,4-glycosidic bond and α1,6-glycosidic bonds. Starch is mainly used as the energy store in plants. It is stored in the form of tubers, fruits and seeds. Glycogen is the main energy store in humans.

Glycosidic bonds are formed during condensation reactions. A small molecule, usually water, is released as a side product[2].

References

  1. Champe PC, Harvey RA, Ferrier DR. (2008)Biochemistry, 4th edition; Philadelphia; Lippincott Williams and Wilkins
  2. https://www.dictionary.com/browse/condensation
Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox