When forming the disaccharide maltose from two glucose monosaccharides:
A) water is eliminated.
B) a hemiacetal is converted to an acetal.
C) the resulting dissacharide is no longer a reducing sugar.
D) water is eliminated and a hemiacetal is converted to an acetal.
E) None of the answers is correct.

Question

Quizplus · Accepted Answer

When forming maltose from two glucose monosaccharides, a water molecule is eliminated during a condensation reaction, which results in the formation of a glycosidic bond between the two glucose molecules. This also causes the formation of an acetal from a hemiacetal, which eliminates the reducing property of maltose as the reducing end of both glucose units is involved in the formation of the glycosidic bond. Therefore, option D is the correct answer as it includes both elimination of water and conversion of hemiacetal to acetal.

When Forming the Disaccharide Maltose from Two Glucose Monosaccharides