Which of the following are all disaccharides ?

Options

A. Maltose, Sucrose, Lactose
B. Maltose, Lactose, Glucose
C. Glycogen, Lactose, Sucrose
D. All of the above

Answer

To determine which of the following are all disaccharides, we need to first understand what disaccharides are and identify examples of them. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understand the Definition of Saccharides**:
- Saccharides are carbohydrates, which are organic compounds made up of carbon, hydrogen, and oxygen.
- They are classified based on the number of sugar units they contain.

2. **Identify Types of Saccharides**:
- **Monosaccharides**: These are the simplest form of carbohydrates, consisting of a single sugar molecule. Examples include glucose and fructose.
- **Disaccharides**: These consist of two monosaccharide units linked together. Examples include:
- **Sucrose**: Composed of glucose and fructose.
- **Lactose**: Composed of glucose and galactose.
- **Maltose**: Composed of two glucose molecules.
- **Polysaccharides**: These are complex carbohydrates made up of many sugar units. Examples include starch and glycogen.

3. **List the Given Options**:
- We need to evaluate the options provided to see which ones consist entirely of disaccharides.

4. **Evaluate Each Option**:
- **Option 1**: Maltose, Sucrose, Lactose - All are disaccharides.
- **Option 2**: Maltose, Lactose, Glucose - Glucose is a monosaccharide, so this option is incorrect.
- **Option 3**: Glycogen, Lactose, Sucrose - Glycogen is a polysaccharide, so this option is incorrect.
- **Option 4**: All of the above - Since options 2 and 3 are incorrect, this option is also incorrect.

5. **Conclusion**:
- The only option that contains all disaccharides is **Option 1**: Maltose, Sucrose, Lactose.

### Final Answer:
The correct answer is **Option 1: Maltose, Sucrose, Lactose**.