Nuclear membrane is derived from

Options

A. ER
B. plasma membrane
C. membrane of mitochondria
D. nucleoplasm

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Cell:**
- The cell is a fundamental unit of life, and it contains various organelles, including the nucleus.
- The nucleus is surrounded by a double membrane known as the nuclear membrane.

2. **Identifying the Composition of the Nuclear Membrane:**
- The nuclear membrane is composed of lipids and proteins, making it a lipoproteinaceous structure.

3. **Role of the Endoplasmic Reticulum (ER):**
- The endoplasmic reticulum (ER) is an organelle involved in the synthesis of proteins and lipids.
- There are two types of ER: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). The rough ER is studded with ribosomes.

4. **Protein Synthesis in the Rough Endoplasmic Reticulum:**
- The rough endoplasmic reticulum is primarily responsible for the synthesis of proteins due to the presence of ribosomes.
- These proteins are essential for forming various cellular structures, including membranes.

5. **Conclusion:**
- The nuclear membrane is derived from the endoplasmic reticulum, specifically from the rough endoplasmic reticulum, which provides the necessary proteins for its formation.

**Final Answer:**
The nuclear membrane is derived from the endoplasmic reticulum (ER), specifically the rough endoplasmic reticulum.

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