Question

determine ring size of glucose

Answer 1

Sugars and fructose are made of a five-atom ring each and glucose makes a six-atom oriented ring.  

Answer 2

Sugars and fructose are made of a five-atom ring each and glucose makes a six-atom oriented ring.
Glucose is comprised the sugar the body needs and utilize to produce energy while fructose is only processed by the life and recommended to be taken in moderate quantity.
Plain sugars belong to the carbohydrate group.
Glucose and fructose belong to monosaccharides and sucrose is a disaccharide comprising two combined with a bond.
Glucose and fructose have the identical molecular formula (C6H12O6) but glucose possess six-member ring and fructose has different with a five-member ring structure.

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