Final answer:
The branch points in glycogen and amylopectin are formed by a-1,6-glycosidic bonds. These bonds connect glucose units in the polysaccharide chains, creating a branching structure.
Step-by-step explanation:
The branch points in glycogen and amylopectin are formed by a-1,6-glycosidic bonds. These bonds connect glucose units in the polysaccharide chains, creating a branching structure. For example, in amylopectin, a molecule may contain thousands of glucose units with branch points occurring about every 25-30 units. These branch points allow for increased accessibility to water and easier digestion.