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Carbohydrates-Ch11
Carbohydrates
18
Biochemistry
Undergraduate 3
10/10/2016

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Term
Carbohydrates
Definition
Most abundant biological molecules. Also called saccharides. Main source: photosynthesis. Various forms play crucial roles in organisms. Breakdown provides energy. Covalently linked w/ variety of other molecules.
Term
Glycolipids
Definition
Carbohydrates that are linked to lipids-biological membranes
Term
Glycoproteins
Definition
Carbohydrates linked to proteins
Term
Glycoconjugates
Definition
Glycolipids and Glycogproteins when lumped together are called:
Term
Charachteristics of carbohydrates
Definition
The existence of at least one and often 2 or more asymmetric centers. The ability to exist either in linear or ring structures. The capacity to form polymeric structures via glycosidic bonds. The potential to form multiple hydrogen bonds with water or other molecules. Emperical formula of (CH2O)n where n is greater than or equal to 3
Term
Monosaccharides
Definition
One monomeric unit. Are given more detailed generic names to describe their functional groups and total number of carbon atoms. Aldo and keto trioses, aldo and keto tetroses, aldo and keto pentoses, aldo and ketohexoses.
Term
Oligosaccharides
Definition
2-20 monosaccharides
Term
Polysaccharides
Definition
> 20 monosaccharides
Term
D-Glucose
Definition
[image]
Term
D-mannose
Definition
[image]
Term
D-galactose
Definition
[image]
Term
D-ribose
Definition
[image]
Term
Maltose
Definition
[image]
Term
Lactose
Definition
[image] glucose + galactose
Term
Sucrose
Definition

[image]

glucose+fructose

Term
Aldose
Definition
Monosaccharides made from aldehydes. Glyceraldehyde is the simplest
Term
Ketoses
Definition
Monosaccharides made from ketones. Didroxyacetone is the simplest.
Term
Epimers
Definition
Sugars that differ only by the configuration around one carbon atom.
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