Which of the following sugars is not a reducing sugar?
A)glucose
B)ribose
C)sucrose
D)starch
E)galactose

Question

Quizplus · Accepted Answer

Sucrose is a disaccharide that is formed by the bonding of fructose and glucose. The glycosidic bond between fructose and glucose makes sucrose a non-reducing sugar because it prevents the formation of an aldehyde or a ketone. On the other hand, glucose, ribose, galactose, and other monosaccharides are reducing sugars as they have a free aldehyde or a ketone functional group which reacts with Benedict's or Fehling's reagent during the reducing sugar test. Starch is not a reducing sugar; it is a polymer of glucose and does not have any free aldehyde or ketone groups.

Which of the Following Sugars Is Not a Reducing Sugar