Which one of the following is a disaccharide

Options

A. Maltose
B. Ribose
C. Glucose
D. Fructose

Answer

To determine which one of the following is a disaccharide, we will first need to understand what disaccharides are and how they are formed.

### Step-by-Step Solution:

1. **Definition of Carbohydrates**: Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1. They are classified into three main categories: monosaccharides, disaccharides, and polysaccharides.

**Hint**: Remember that carbohydrates are made of carbon and water.

2. **Understanding Monosaccharides**: The smallest unit of carbohydrates is a monosaccharide, which can exist independently. Examples include glucose, fructose, and ribose.

**Hint**: Monosaccharides are the building blocks of more complex carbohydrates.

3. **Formation of Disaccharides**: Disaccharides are formed when two monosaccharides are linked together through a covalent bond known as a glycosidic bond.

**Hint**: Think of disaccharides as two monosaccharides joined together.

4. **Examples of Disaccharides**: Common examples of disaccharides include:
- **Maltose**: Formed from two glucose molecules.
- **Sucrose**: Formed from glucose and fructose.
- **Lactose**: Formed from glucose and galactose.

**Hint**: Look for combinations of two monosaccharides to identify disaccharides.

5. **Identifying the Correct Answer**: Among the options provided, if "maltose" is listed, it is a disaccharide because it consists of two glucose units linked together.

**Hint**: Check if the options include combinations of two monosaccharides.

### Conclusion:
The correct answer is **maltose**, as it is a disaccharide formed from two glucose molecules.