Which of the following carbohydrates are polymers of glucose?

• A. Cellulose
• B. Fructose
• C. Lactose
• D. Sucrose

Answer: (A)

Verified step by step guidance

1. Understand the concept of carbohydrates: Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen. They can be classified into monosaccharides (single sugar units), disaccharides (two sugar units), and polysaccharides (long chains of sugar units). Polymers of glucose are specifically polysaccharides made up of repeating glucose units.
2. Analyze the given options: Cellulose, Fructose, Lactose, and Sucrose. Determine whether each is a polymer of glucose by examining its structure and composition.
3. Cellulose: Cellulose is a polysaccharide composed entirely of glucose monomers linked by β-1,4-glycosidic bonds. It is a polymer of glucose and is found in the cell walls of plants.
4. Fructose: Fructose is a monosaccharide (single sugar unit) and is not a polymer of glucose. It is a simple sugar found in fruits and honey.
5. Lactose and Sucrose: Both are disaccharides, meaning they consist of two sugar units. Lactose is composed of glucose and galactose, while sucrose is composed of glucose and fructose. Neither is a polymer of glucose, as they are not long chains of glucose monomers.