What type of linkage connects glucose molecules linearly in glycogen?

The connection between glucose molecules in glycogen is characterized by alpha 1-4 linkages. Glycogen is a polysaccharide made up of numerous glucose units that are primarily connected through these alpha 1-4 glycosidic bonds. This type of bond allows for a linear chain of glucose molecules, creating the backbone of the glycogen structure.

In addition to the linear chains formed by alpha 1-4 linkages, glycogen also has branching points, which are established by alpha 1-6 linkages. These branches enhance the solubility and accessibility of glycogen for quick mobilization of glucose when energy is required by the body. However, the question specifically inquires about the linear connections between the glucose units, which is why the alpha 1-4 linkage is the correct focus here.

Thus, the structure and function of glycogen, particularly in energy storage in animals, depends significantly on these alpha 1-4 linkages for its linear arrangement.