Which of the following is a disaccharide

Options

A. Glucose
B. Fructose
C. Sucrose
D. Galactose

Answer

To determine which of the following options is a disaccharide, we will analyze each option based on the definition of disaccharides and their characteristics.

### Step-by-Step Solution:

1. **Define Disaccharide**:
A disaccharide is a type of carbohydrate that is formed when two monosaccharides are joined together by a glycosidic linkage. Disaccharides are simple sugars that are soluble in water.

2. **Identify Common Disaccharides**:
Common examples of disaccharides include sucrose, lactose, and maltose.

3. **Analyze Each Option**:
- **Option 1: Glucose**
- Glucose is a monosaccharide. It is often referred to as grape sugar or blood sugar.
- **Conclusion**: This option is incorrect as glucose is not a disaccharide.

- **Option 2: Fructose**
- Fructose is also a monosaccharide, known as levulose, and is found in fruits and honey.
- **Conclusion**: This option is incorrect as fructose is not a disaccharide.

- **Option 3: Sucrose**
- Sucrose is a disaccharide composed of glucose and fructose. It is commonly known as table sugar or cane sugar.
- **Conclusion**: This option is correct as sucrose is indeed a disaccharide.

- **Option 4: Galactose**
- Galactose is a monosaccharide that is part of lactose, which is a disaccharide made up of glucose and galactose.
- **Conclusion**: This option is incorrect as galactose is not a disaccharide.

4. **Final Answer**:
Based on the analysis, the only disaccharide among the options provided is **sucrose**.