Which of the following groups consists of polysaccharides only ?

Options

A. Sucrose, glucose and fructose
B. Maltose, lactose and fructose
C. Glycogen, sucrose and maltose
D. Glycogen , cellulose and starch

Answer

To determine which group consists of polysaccharides only, we need to understand the classification of carbohydrates, particularly polysaccharides.

### Step-by-Step Solution:

1. **Understand Carbohydrates**: Carbohydrates are classified into three main categories: monosaccharides, disaccharides, and polysaccharides.

2. **Define Polysaccharides**: Polysaccharides are complex carbohydrates that consist of long chains of monosaccharide units (10 or more). They are primarily categorized into storage polysaccharides and structural polysaccharides.

3. **Identify Storage Polysaccharides**:
- **Glycogen**: This is a storage polysaccharide found in animals, primarily stored in the liver and muscles.
- **Starch**: This is a storage polysaccharide found in plants.

4. **Identify Structural Polysaccharides**:
- **Cellulose**: This polysaccharide forms the cell wall of plants.
- **Chitin**: This is found in the exoskeleton of arthropods.

5. **Evaluate the Options**: We need to look at the options provided in the question and identify which group contains only polysaccharides.
- If the group includes monosaccharides (like glucose or fructose) or disaccharides (like sucrose, maltose, or lactose), it cannot be the correct answer.

6. **Select the Correct Group**: After analyzing the options, the group that includes glycogen, cellulose, and starch consists solely of polysaccharides. Therefore, this is the correct answer.

### Final Answer:
The group that consists of polysaccharides only is option number 4, which includes glycogen, cellulose, and starch.

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