A disaccharide forms when
A) two monosaccharides join by dehydration reactions.
B) two starches join by dehydration reactions.
C) two monosaccharides join by hydrolysis.
D) two starches join by hydrolysis.

Question

Quizplus · Accepted Answer

A disaccharide forms when two monosaccharides join by dehydration reactions, which remove a water molecule and form a glycosidic linkage between the two sugar molecules. Option B and D are incorrect because starches are polysaccharides and cannot form disaccharides by joining with another starch. Option C is also incorrect because hydrolysis is the process of breaking down a larger molecule into smaller ones by the addition of water, which is not the process of forming a disaccharide.

A Disaccharide Forms When