Carbohydrates the general names of sugars are monomer (monosaccharides), dimers (disaccharides), trimer (trisaccharides), oligomers (oligosaccharides) and polymers (polysaccharides) derived from sugars (sucrose, Latin for sugar).A monosaccharide or simple sugar is an aldehyde or ketone with at least two hydroxyl groups. Thus the two simple members of this class of compounds are 2 and 3- dihydroxypropanal (glycerol aldehyde), 1 and 3-dihydroxypropanone (1 and 3-dihydroxyacetone). Aldehyde sugars are classified as aldehydes. Those who have a ketone agent are called ketosis. Depending on the length of the chain, sugars are called triose (3 carbon), tetrose (4 carbon), pentose (5 carbon), hexose (6 carbon), and so on. Hence, 2 and 3-dihydroxypropanol (glycerol aldehyde) is an aldotriose. While 1 and 3-dihydroxypropanone is a ketotriose.In this review we concluded that carbohydrates are divided into 4 groups, monosaccharides, disaccharides, oligosaccharides, polysaccharides. The chemical formula of carbohydrates is Cx (H2O) y. So simple carbohydrates have the formula Cx (H2O) where y is three or more. Sugar is a carbohydrate that is easily absorbed by our body while the body takes more time to absorb complex carbohydrates.
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