Sucrose, or common table sugar, is composed of glucose and fructose.

In chemistry, a dimer is a molecule composed of two similar subunits or monomers linked together. It is a special case of a polymer. Among the most common dimers are certain types of sugar; sucrose, for example, is a dimer of a glucose molecule and a fructose molecule. Sucrose structural diagram Created by Maxim Iorsh with xymtex documentclass{letter} usepackage{epic,chemstr,hcycle,aliphat} pagestyle{empty} begin{document} begin{picture}(1200,1500)(0,0) put(0,0){pyranose{1Sb==H;2Sb==H;2Sa==OH;3Sb==OH;3Sa==H;4Sb==H;4Sa==HO;5Sb==CH$_2$OH;5Sa==H... Sucrose structural diagram Created by Maxim Iorsh with xymtex documentclass{letter} usepackage{epic,chemstr,hcycle,aliphat} pagestyle{empty} begin{document} begin{picture}(1200,1500)(0,0) put(0,0){pyranose{1Sb==H;2Sb==H;2Sa==OH;3Sb==OH;3Sa==H;4Sb==H;4Sa==HO;5Sb==CH$_2$OH;5Sa==H... Sucrose is the common chemical name for table sugar. ... Chemistry (in Greek: χημεία) is the science of matter that deals with the composition, structure, and properties of substances and with the transformations that they undergo. ... A molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ... A polymer is a generic term used to describe a substantially long molecule. ... A sugar is a carbohydrate which contains the functional group (CH2O)n). ... Sucrose is the common chemical name for table sugar. ... A space-filling model of glucose Glucose, a simple monosaccharide sugar, is one of the most important carbohydrates and is used as a source of energy in animals and plants. ... Fructose is a simple sugar (monosaccharide) found in many foods and one of the three most important blood sugars along with glucose and galactose. ...

A physical dimer is a term that designates the case where intermolecular interaction brings two identical molecules closer together than other molecules. There are no chemical bonds between the physical dimer molecules.

In biology, a dimer is a protein complex made up of two subunits. In a homodimer the two subunits are identical, and in a heterodimer they differ (though they are often still very similar in structure). The subunits do not need to be covalently linked, and usually aren't. Main articles: Life All organisms (viruses not included) consist of cells, which in turn, are based on a common carbon-based biochemistry. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ...

See also

• oligomer
• polymer