How are monosaccharides combined into polymers? What chemical bonds determine the spatial configuration of polysaccharides?

Some carbohydrates are natural polymers consisting of many hundreds and even thousands of monosaccharide units that make up a single macromolecule. Therefore, such substances are called polysaccharides. The most important polysaccharides are starch and cellulose. Both of them are formed in plant cells from glucose, the main product of the photosynthesis process.
The monosaccharide residue is able to form one glycosidic bond with the neighboring monosaccharide, but can provide several hydroxyl groups for the attachment of other monosaccharides. Accordingly, as in the case of oligosaccharides, the polysaccharide molecules can be linear or branched.