When two monosaccharides undergo a dehydration synthesis,

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When two monosaccharides undergo a dehydration synthesis, a disaccharide is formed. This is because a molecule of water is removed from the two monosaccharides, resulting in the formation of a glycosidic bond between the two sugar molecules. This process is commonly seen in the formation of disaccharides such as maltose (glucose + glucose), lactose (glucose + galactose) and sucrose (glucose + fructose). Polysaccharides and starches are formed by the linkage of multiple monosaccharide molecules through repeated dehydration synthesis reactions.

When Two Monosaccharides Undergo a Dehydration Synthesis