Disaccharide Formation and Formulas

Steps:

• Glucose and fructose monomers both have formula C₆H₁₂O₆.
• Disaccharides form via condensation reaction, combining two monosaccharides and losing one H₂O molecule.
• Maltose (glucose + glucose) yields C₁₂H₂₂O₁₁.
• Sucrose (glucose + fructose) also yields C₁₂H₂₂O₁₁.

Why A is correct:

• A lists C₁₂H₂₂O₁₁ for both maltose and sucrose, matching the standard disaccharide formula from condensation.

Why the others are wrong:

• B incorrectly shows C₆H₁₂O₆ for maltose (monosaccharide formula) and C₁₂H₂₂O₁₁ for sucrose.
• C lists C₁₂H₂₂O₁₁ for maltose but C₆H₁₂O₆ for sucrose, reversing the error.
• D shows C₆H₁₂O₆ for both, ignoring water loss in disaccharide formation.

Final answer: A