Ring Structure of Monosaccharides MCQ - Practice Questions with Answers

Ring Structure of Monosaccharides

• Monosaccharides can exist as a linear chain or as ring-shaped molecules.
• The ring shaped is formed in the aqueous solution. 
• When the monosaccharides cyclize to form rings, they typically form two types of rings as furanose or pyranose.
• Furanose is a five-membered ring structure.
• Pyranose is a six-membered ring structure.

• In case of aldose sugars, the ring structure is formed when the alcohol group reacts with the aldehyde to produce a hemiacetal.
• In case of ketose sugars, the ring structure is formed when the alcohol group reacts with the ketone to produce hemiketal.
• Both reactions result in the ring-structure with a new asymmetric carbon called the anomeric carbon.

       Formation of ring structure in Glucose through the reaction of -OH with -CHO