Question

Which of the following(s) is/are correct regarding maltose?

• A. It consists of two glucopyranose units
• B. It is a non-reducing sugar
• C. Glycosidic bond between C1 of one unit and C4 of the other unit
• D. It is a disaccharide

Answer 1

Answer: (A), (C), (D)

It is a disaccharide

Maltose is a disaccharide. Hydrolysis of maltose gives two monomers of glucose.
$\underset{\text{Maltose}}{C_{12}{H}_{22}{O}_{11}}\stackrel{\text{Hydrolysis}}{\to }\underset{\alpha \text{-D-glucose}}{C_6{H}_{12}{O}_6}+\underset{\alpha \text{-D-glucose}}{C_6{H}_{12}{O}_6}$



The free aldehyde group can be produced at the C1 carbon of the second α-D-glucose unit in solution and it shows reducing properties. Hence, it is a reducing sugar.
Glycosidic bond between C1 of one unit and C4 of the other unit