Lactose is a polysaccharide of

Options

A. Glucose + fructose
B. Glucose + glucose
C. Glucose + galactose
D. Galactose + galactose

Answer

**Step-by-Step Solution:**

1. **Understanding Lactose**: Lactose is classified as a carbohydrate, specifically a disaccharide, not a polysaccharide. It consists of two simpler sugars.

2. **Components of Lactose**: Lactose is made up of two monosaccharides: glucose and galactose. These two sugars are chemically bonded together.

3. **Formation of Lactose**: The bond between glucose and galactose forms lactose through a process called glycosidic linkage. This occurs during the synthesis of lactose in the mammary glands of mammals.

4. **Presence in Nature**: Lactose is commonly found in milk, which is why it is often referred to as "milk sugar." It comprises about 2-8% of the total composition of mammalian milk.

5. **Conclusion**: Therefore, the correct answer to the question "Lactose is a polysaccharide of" is that it is a disaccharide made up of glucose and galactose.

**Final Answer**: Lactose is a disaccharide composed of glucose and galactose.

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