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en.wikipedia.org/wiki/Glucose

Structure and nomenclature. Glucose is a monosaccharide with formula C 6 H 12 O 6 or H-(C=O)-(CHOH) 5-H, whose five hydroxyl (OH) groups are arranged in a specific way along its six-carbon back. Glucose is usually present in solid form as a monohydrate with a closed pyran ring (dextrose hydrate).

pubchem.ncbi.nlm.nih.gov/compound/D-glucose

Glucose is a monosaccharide containing six carbon atoms and an aldehyde group and is therefore referred to as an aldohexose. The glucose molecule can exist in an open-chain (acyclic) and ring (cyclic) form, the latter being the result of an intramolecular reaction between the aldehyde C atom and the C-5 hydroxyl group to form an intramolecular hemiacetal.

www.britannica.com/science/glucose

Glucose, also called dextrose, one of a group of carbohydrates known as simple sugars (monosaccharides).Glucose (from Greek glykys; “sweet”) has the molecular formula C 6 H 1 2 O 6.It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the source of energy in cell function, and the regulation of its metabolism is of great importance ...

www.biotopics.co.uk/as/glucose2.html

Glucose is an example of a carbohydrate which is commonly encountered. It is also known as blood sugar, and dextrose. Its chemical formula is C 6 H 12 O 6, and this empirical formula is shared by other sugars - called hexoses - 6 carbon sugars. You may wish to know in some detail how these 24 atoms are arranged in the molecule of glucose - the structural formula.

chemistry.elmhurst.edu/vchembook/543glucose.html

Ring Structure for Glucose: Up until now we have been presenting the structure of glucose as a chain. In reality, an aqueous sugar solution contains only 0.02% of the glucose in the chain form, the majority of the structure is in the cyclic chair form.

www.dbriers.com/tutorials/.../draw-the-structure-of-glucose-molecule

The Cyclic (ring) Structure. When drawing the ring structure of glucose or any other molecule, most of the carbons atoms are represented by a bent line. Just for technical purposes I am showing the alpha-D-glucose molecule below. This is the form of glucose used to make starches such as amylose and amylopectin that are easily digestible.

www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/carbhyd.htm

The most common carbohydrate is glucose (C 6 H 12 O 6). Applying the terms defined above, glucose is a monosaccharide, an aldohexose (note that the function and size classifications are combined in one word) and a reducing sugar. The general structure of glucose and many other aldohexoses was established by simple chemical reactions.

www.chem.purdue.edu/jmol/molecules/glucose.html

Structural Formula. C 6 H 12 O 6. glucose . dextrose . Molecular Model ...

www.khanacademy.org/.../v/molecular-structure-of-glucose

Molecular structure of glucose. Monosaccharide structure. Linear and ring forms. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

www.chem.wisc.edu/deptfiles/genchem/netorial/modules/bio...

Glucose: Linear and Cyclic Forms. One of the most important carbohydrates in the body is glucose (C 6 H 12 O 6).Glucose is called a monosaccharide because it forms one simple building block of more complicated carbohydrates. One structure of glucose is shown below.