A cell organelle with a definite polarity is

Options

A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Chloroplast

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a cell organelle that has a definite polarity. Polarity in cell biology refers to the structural and functional differences between two ends of an organelle.

2. **Analyzing the Options**: The options given are:
- Ribosome
- Mitochondria
- Golgi apparatus
- Chloroplast

3. **Identifying the Characteristics of Each Organelle**:
- **Ribosome**: Ribosomes are not organelles with polarity; they are the sites of protein synthesis and do not have distinct structural ends.
- **Mitochondria**: Mitochondria are known as the powerhouse of the cell and have a double membrane structure, but they do not exhibit clear polarity.
- **Chloroplast**: Chloroplasts are involved in photosynthesis and are found only in plant cells. They also do not have a definitive polarity.
- **Golgi Apparatus**: The Golgi apparatus consists of a series of flattened, membrane-bound sacs called cisternae. It has a clear polarity, with a cis face (receiving side) and a trans face (shipping side).

4. **Conclusion**: Based on the analysis, the Golgi apparatus is the only organelle among the options that exhibits definite polarity due to its structure and functional organization.

5. **Final Answer**: The cell organelle with a definite polarity is the **Golgi apparatus**.

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