The space enclosed between two paralllel membranes of nucleus is known as ______ space

Options

A. Periplastidial
B. Perinuclear
C. Perimitochondrial
D. Lumen

Answer

To answer the question, "The space enclosed between two parallel membranes of the nucleus is known as ______ space," we will analyze the options provided and identify the correct term.

### Step-by-Step Solution:

1. **Understanding the Structure of the Nucleus**:
- The nucleus is surrounded by a double membrane known as the nuclear envelope, which consists of two layers: the inner membrane and the outer membrane.

2. **Identifying the Space Between the Membranes**:
- The space between these two membranes is crucial for various nuclear functions, including the transport of materials in and out of the nucleus.

3. **Evaluating the Options**:
- **Option 1: Pariplastidial**: This term refers to spaces associated with plastids, not the nucleus. Therefore, this option is incorrect.
- **Option 2: Perinuclear**: This term specifically refers to the space surrounding the nucleus, which is indeed the space between the inner and outer membranes of the nuclear envelope. This is the correct answer.
- **Option 3: Perimitochondrial**: This term relates to the space between the membranes of mitochondria, not the nucleus. Thus, this option is incorrect.
- **Option 4: Lumen**: While this term is used in various contexts in cell biology, it does not specifically refer to the space between the nuclear membranes. Hence, this option is also incorrect.

4. **Conclusion**:
- Based on the analysis of the options, the correct answer is **Perinuclear space**.

### Final Answer:
The space enclosed between two parallel membranes of the nucleus is known as **perinuclear space**.

---