Which projection is used to depict cyclic monosaccharides?

• A. Fischer projection
• B. Haworth projection
• C. Newman projection
• D. Fisher projection

Answer: (B)

Haworth projections are used to depict the cyclic form of monosaccharides. They represent the ring as a flat polygon and show substituents on the ring either above or below the plane, capturing the stereochemistry that arises when the sugar cyclizes. This format also distinguishes alpha and beta anomers based on the orientation of the anomeric hydroxyl group. In contrast, Fischer projections illustrate the linear open-chain form, and Newman projections visualize rotation around a specific bond for conformational analysis. So, for showing the cyclic structure and its stereochemistry, Haworth projection is the appropriate choice.