Glycogen's branched α-glucose structure

Steps:

• Recall glycogen is a polysaccharide of α-D-glucose with α-1,4 linkages in chains and α-1,6 at branches.
• Inspect diagrams for α-glycosidic bonds between glucose rings.
• Check for branching pattern typical of glycogen's highly branched form.
• Match to the diagram with correct linkages and branches.

Why B is correct:

• B depicts α-1,4-linked glucose chains with an α-1,6 branch point, aligning with glycogen's definition as a branched storage polymer.

Why the others are wrong:

• A: Features β-1,4 linkages, forming straight chains like cellulose.
• C: Shows only linear α-1,4 chains without branches, resembling amylose.
• D: Lacks proper glycosidic bonds or uses non-glucose monomers.

Final answer: B