Which of the following carbohydrate is used in the liver for energy storage?

Options

A. Starch
B. Cellulose
C. Glycogen
D. Glycerol

Explanation

To determine which carbohydrate is used in the liver for energy storage, let's analyze the given options step by step:

1. **Starch**:
- Starch is a polymer of glucose and serves as a storage polysaccharide in plants. It exists in two forms: amylose and amylopectin. Since starch is primarily found in plants and not in animal tissues, it cannot be used for energy storage in the liver.
- **Conclusion**: Starch is not the correct answer.

2. **Cellulose**:
- Cellulose is another polysaccharide made up of beta-linked D-glucose units. It is a crucial structural component of the cell walls in plants and some algae. Like starch, cellulose is not found in animal tissues, including the liver.
- **Conclusion**: Cellulose is also not the correct answer.

3. **Glycogen**:
- Glycogen is a storage polysaccharide found in animals. It is primarily stored in the liver and skeletal muscles and serves as an energy reserve. When the body needs energy, glycogen can be broken down into glucose, which can then be used for energy.
- **Conclusion**: Glycogen is the correct answer.

4. **Glycerol**:
- Glycerol is a simple polyol compound that forms the backbone of triglycerides (fats). It is not a carbohydrate and does not serve as an energy storage molecule in the liver.
- **Conclusion**: Glycerol is not the correct answer.

**Final Answer**: The carbohydrate used in the liver for energy storage is **glycogen**.