Final answer:
Monosaccharides form polysaccharides by creating glycosidic bonds through a dehydration reaction, where a water molecule is released as the bond forms.
Step-by-step explanation:
Monosaccharides may link together to form polysaccharides by forming a type of covalent bond known as a glycosidic bond. A glycosidic bond forms during a dehydration reaction, also referred to as a condensation reaction or dehydration synthesis.
This process involves the hydroxyl group of one monosaccharide combining with the hydrogen of another monosaccharide, which leads to the release of a water molecule and the creation of the bond. Polysaccharides such as starch, glycogen, cellulose, and chitin are all examples of long chains of monosaccharides linked by glycosidic bonds.