What is the common name of the disaccharide molecule that contains glucose and fructose?

• A. Cellobiose
• B. Sucrose
• C. Lactose
• D. Maltose

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the structure of disaccharides. Disaccharides are carbohydrates composed of two monosaccharides linked by a glycosidic bond. In this case, the monosaccharides mentioned are glucose and fructose.
2. Step 2: Recall the common disaccharides and their monosaccharide components. For example: Sucrose is composed of glucose and fructose, Lactose is composed of glucose and galactose, Maltose is composed of two glucose molecules, and Cellobiose is composed of two glucose molecules linked differently than maltose.
3. Step 3: Identify the disaccharide that contains glucose and fructose. Based on the structural composition, sucrose is the disaccharide formed by the combination of glucose and fructose.
4. Step 4: Confirm the glycosidic bond type in sucrose. Sucrose has an α(1→2) glycosidic bond between the anomeric carbon of glucose and the anomeric carbon of fructose.
5. Step 5: Conclude that the common name of the disaccharide molecule containing glucose and fructose is sucrose, based on its structure and glycosidic bond.