Question

Which of the following is the correct grouping of disaccharides?

• A. Glucose, fructose, sucrose
• B. Lactose, cellulose, mannose
• C. Lactose, sucrose, maltose
• D. Glucose, sucrose, cellulose

Hint:

Remember LSM for common disaccharides: Lactose, Sucrose, Maltose. Everything else is usually a monomer or a polymer.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks to identify the group containing only disaccharides. Disaccharides are carbohydrates formed by the union of two monosaccharide molecules via a glycosidic bond.

Step 2: Detailed Explanation:

• Lactose: A disaccharide found in milk, consisting of Glucose and Galactose.

• Sucrose: Common table sugar, a disaccharide consisting of Glucose and Fructose.

• Maltose: Malt sugar, a disaccharide consisting of two Glucose units.

• Analysis of other groupings:
• Glucose, Fructose, Mannose: These are all Monosaccharides.

• Cellulose: This is a Polysaccharide.

• Verification:
• (A) contains monosaccharides (glucose, fructose).

• (B) contains a polysaccharide (cellulose).

• (D) contains a monosaccharide and a polysaccharide.

• (C) correctly lists the three most common dietary disaccharides.

Step 3: Final Answer:
The grouping in option (C) consists exclusively of disaccharides.