The cell wall of a plant cell contains

Options

A. starch
B. chitin
C. protein
D. cellulose

Answer

To answer the question "The cell wall of a plant cell contains," we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding the Components of the Cell Wall**:
- The cell wall is a rigid structure that surrounds the cell membrane in plant cells. It provides structural support and protection.

2. **Evaluating the Options**:
- **Option A: Starch**:
- Starch is a polymer of glucose and serves as a reserve food material in plants. However, it is not a component of the cell wall.
- **Option B: Chitin**:
- Chitin is found in the cell walls of fungi, not in plant cells. It is a polymer made of N-acetylglucosamine and provides structural support in fungi.
- **Option C: Proteins**:
- While proteins can be present in various cellular structures, they are not a primary component of the plant cell wall.
- **Option D: Cellulose**:
- Cellulose is the most abundant carbohydrate in nature and is a major component of the plant cell wall. It is made up of long chains of glucose units linked by beta-1,4-glycosidic bonds.

3. **Conclusion**:
- Based on the analysis, the correct answer is **cellulose**. The plant cell wall primarily consists of cellulose, which provides rigidity and strength.

### Final Answer:
The cell wall of a plant cell contains **cellulose**.