Matching Polysaccharide Structures to Monomers and Bonds

Steps:

• Examine diagrams for monomer type: straight glucose chains indicate cellulose (β-glucose), acetylated amino sugars indicate chitin (N-acetylglucosamine).
• Check glycosidic bonds: β-1→4 links form linear structures in cellulose and chitin, distinguishing from α-linked variants.
• Assign diagram 3 (β-glucose 1→4) to first description for F, diagram 1 (N-acetylglucosamine 1→4) to second for G, and diagram 2 (likely α-glucose) to third for H.
• Verify sequence 3-1-2 aligns with standard polysaccharide diagrams.

Why B is correct:

• B assigns diagram 3 (β-glucose monomers with 1→4 bonds) to F, diagram 1 (N-acetylglucosamine with 1→4 bonds) to G, and diagram 2 to H, matching cellulose and chitin definitions.

Why the others are wrong:

• A misassigns β-glucose to G, confusing cellulose with chitin.
• C duplicates B but is listed as identical, invalidating as distinct choice.
• D swaps chitin and third diagram, mismatching N-acetylglucosamine to H.

Final answer: B