Sucrose is a disaccharide of Dglucose connected to Dfructose

Sucrose is a disaccharide of D-glucose connected to D-fructose by an a,b-(1 2)- glycosidic bond. Sucrose is not a reducing sugar because

Select one:

a. it is a disaccharide.

b. it reacts with Benedict\'s solution.

c. it contains both glucose and fructose.

d. it cannot react to produce an aldehyde group.

Solution

Answer: d. it cannot react to produce an aldehyde group.

Explanation:

Sucrose is not a reducing sugar because it lacks the ability to form either aldehyde or a ketone in a basic solution. It cannot perform as a reducing agent in solutions at a pH above 7. The Benedict\'s solution or other test reagents is used to check for reducing sugars. The reagents react with the sugar and they bring a color change. They do not give color change with non-reducing sugars, including sucrose.