Organelle withour a cell membrane is

Options

A. ribosome
B. Golgi apparatus
C. chloroplast
D. nucleus

Explanation

**Step-by-Step Solution:**

1. **Understanding Cell Organelles**: Begin by recognizing that cell organelles are specialized structures within a cell that perform distinct functions. Most organelles are either surrounded by a single or double membrane.

2. **Identifying the Options**: The question provides four options:
- A) Ribosome
- B) Golgi apparatus
- C) Chloroplast
- D) Nucleus

3. **Analyzing Each Option**:
- **Ribosome**: This organelle is known for protein synthesis and is not surrounded by a membrane. It is found freely in the cytoplasm or attached to the endoplasmic reticulum.
- **Golgi Apparatus**: This organelle is membrane-bound and is involved in modifying, sorting, and packaging proteins.
- **Chloroplast**: This organelle is also membrane-bound and is involved in photosynthesis in plant cells.
- **Nucleus**: This organelle contains the cell's genetic material and is surrounded by a double membrane.

4. **Conclusion**: Among the options provided, the only organelle that does not have a cell membrane is the ribosome. Therefore, the correct answer is **A) Ribosome**.

5. **Additional Information**: Ribosomes are often referred to as the "protein factories" of the cell because they are essential for synthesizing proteins, which are crucial for various cellular functions.

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