What type of biological molecule is formed by linking many monosaccharides together?

When many monosaccharides are linked together, they form a polymer, specifically a type of carbohydrate known as a polysaccharide. Polymers are large molecules made up of repeating units, which can be monosaccharides, amino acids, nucleotides, or other basic units depending on the type of polymer. In the case of carbohydrates, linking multiple monosaccharides through glycosidic bonds creates complex carbohydrates such as starch, glycogen, or cellulose.

A monomer refers to a single, basic unit of a macromolecule, and in this context, monosaccharides are the monomers that combine to form a polymer. An oligosaccharide consists of a small number of monosaccharide units (typically 2 to 10) linked together, but since the question refers to many monosaccharides, it does not fit this definition. A peptide, on the other hand, is a chain of amino acids, which is unrelated to carbohydrates and thus does not apply in this context.