Which of the following is known as "System of membrane" :-

Options

A. Lysosome
B. E.R.
C. Mitochondria
D. Chloroplast

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which structure is referred to as the "system of membrane" within a cell.

2. **Identifying Cell Organelles**: In a typical cell, several organelles are present, including the nucleus, lysosomes, mitochondria, chloroplasts, endoplasmic reticulum, and Golgi apparatus.

3. **Analyzing Each Organelle**:
- **Lysosome**: Contains hydrolytic enzymes and has a single membrane structure.
- **Mitochondria**: Known for ATP production and aerobic respiration, has a double membrane but is not referred to as a "system of membrane."
- **Chloroplast**: Involved in photosynthesis, also has a double membrane but is not termed as a "system of membrane."
- **Endoplasmic Reticulum (ER)**: This organelle is extensive and has a membrane structure that spreads throughout the cell. It can be rough (with ribosomes) or smooth (without ribosomes).

4. **Conclusion**: The endoplasmic reticulum is characterized by its extensive membrane system that is interconnected throughout the cell, making it the correct answer to the question.

5. **Final Answer**: The endoplasmic reticulum is known as the "system of membrane."

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