Polysaccharides are considered to be polymers of monosaccharides containing ten or more monosaccharide residues. Acarbose is an oligosaccharide, whereas miglitol resembles a monosaccharide. When combined with glucose (monosaccharide), through a condensation reaction, the result is the disaccharide lactose. The glycosidic bond can be formed between any hydroxyl group on the component monosaccharide. In chemistry, a pentose is a monosaccharide (simple sugar) with five carbon atoms. Oat beta-glucan is a viscous polysaccharide made up of units of the monosaccharide D-glucose. Sucrose is found naturally in many food plants along with the monosaccharide fructose. There are two major metabolic pathways of monosaccharide catabolism&colon; glycolysis and the citric acid cycle. A triose is a monosaccharide, or simple sugar, containing three carbon atoms. Glucose is an example of a monosaccharide as is fructose. A ketose is a monosaccharide containing one ketone group per molecule. Glucose is a hexose&colon; a monosaccharide containing six carbon atoms. "N"-Acetylglucosamine (GlcNAc) is an amide derivative of the monosaccharide glucose. Methylglucoside is a monosaccharide derived from glucose. Glyceraldehyde (glyceral) is a triose monosaccharide with chemical formula CHO.