The membrane of endoplasmic reticulum remains continuous with membrane of

Options

A. plasma membrance and lysosome
B. Golgi-complex and plastids
C. plasma -membrane and ER
D. plasma - membrane and nuclear membrane

Answer

### Step-by-Step Solution:

1. **Understanding the Endoplasmic Reticulum (ER)**:
- The endoplasmic reticulum is a network of membranes within the cell that plays a crucial role in the synthesis of proteins and lipids. It is divided into two types: rough ER (with ribosomes) and smooth ER (without ribosomes).

2. **Identifying the Membrane Connections**:
- The question asks about the continuity of the ER membrane with other membranes. The ER is an extension of the nuclear envelope and also connects to the plasma membrane.

3. **Nuclear Membrane Connection**:
- The endoplasmic reticulum is directly continuous with the outer membrane of the nuclear envelope. This means that the membrane of the ER is an extension of the nuclear membrane, allowing for the transport of materials between the nucleus and the cytoplasm.

4. **Plasma Membrane Connection**:
- The endoplasmic reticulum also extends towards the plasma membrane. This connection facilitates the transport of synthesized proteins and lipids to the cell surface or for secretion outside the cell.

5. **Conclusion**:
- Therefore, the membrane of the endoplasmic reticulum remains continuous with both the nuclear membrane and the plasma membrane.

### Final Answer:
The membrane of the endoplasmic reticulum remains continuous with the membrane of the **nuclear membrane** and the **plasma membrane**.

---