which of the following organelle is not found in the root cells of a plant ?

Options

A. nucleus
B. vacuole
C. mitochondria
D. chloroplasts

Answer

To determine which organelle is not found in the root cells of a plant, we can analyze the options provided: nucleus, vacuole, mitochondria, and chloroplast.

### Step-by-Step Solution:

1. **Understand the Function of Each Organelle**:
- **Nucleus**: Known as the brain of the cell, it contains DNA and is essential for cell functions, including growth and reproduction. It is present in all plant cells, including root cells.
- **Vacuole**: This organelle stores nutrients, waste products, and helps maintain turgor pressure in plant cells. Vacuoles are large in plant cells and are present in root cells.
- **Mitochondria**: Referred to as the powerhouse of the cell, mitochondria are responsible for producing energy (ATP) through cellular respiration. They are found in all eukaryotic cells, including root cells.
- **Chloroplast**: This organelle is responsible for photosynthesis, converting sunlight into chemical energy. Chloroplasts contain chlorophyll, which gives plants their green color. They are primarily found in the green parts of plants, such as leaves.

2. **Identify the Organelle Not Found in Root Cells**:
- Since root cells are located underground, they do not receive sunlight and therefore do not perform photosynthesis. As a result, chloroplasts, which are necessary for this process, are not present in root cells.

3. **Conclusion**:
- Based on the functions and presence of the organelles, the organelle that is not found in the root cells of a plant is **chloroplast**.

### Final Answer:
The organelle that is not found in the root cells of a plant is **chloroplast**.

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