Glucose cycling

In this video I will explain glucose cycling.

In a glucose cyclingWhen attacked by the water molecules, it will fold over itself so that carbon 1 and carbon 5 will stay very close, forming almost a hexagon.

The aldehyde or ketone group in an open straight chain of a monosaccharide will reversibly react with the hydroxyl group on a carbon atom different in the same molecule to form a hemiacetal or hemiketal, forming a heterocyclic ring, with an oxygen bridge between the two carbon atoms.

The rings with five and six atoms are called furanose and pyranose forms and exist in equilibrium with the open linear chain.

During the conversion of the open linear shape To cyclic form, the carbon atom containing the carbonyl oxygen, called the anomeric carbon, is transformed into a chiral center with two possible configurations: the oxygen atom can take a position above or below the plane of the ring. The resulting pair of stereoisomers are called anomers.

Also, on the web I have left you some printable exercises with their solutions so that you can practice what you learned in today's lesson.