The interphase nucleus is enclosed in :

Options

A. a non-porous double membrane
B. a non-porous single membrane
C. a porous double membrane
D. many membranes

Explanation

**Step-by-Step Solution:**

1. **Understanding the Interphase Nucleus**: The interphase nucleus is a crucial part of the cell cycle, where the cell prepares for division. It is characterized by a well-defined structure that is involved in various metabolic activities.

2. **Nuclear Membrane Structure**: The interphase nucleus is enclosed by a nuclear membrane, which is a double membrane structure. This means it has two layers.

3. **Porosity of the Membrane**: Unlike a non-porous membrane, the nuclear membrane is porous. This porosity allows for the transport of essential molecules such as proteins, enzymes, and lipids between the nucleus and the cytoplasm.

4. **Elimination of Incorrect Options**:
- A non-porous double membrane is incorrect because the nuclear membrane does have pores.
- A non-porous single membrane is also incorrect since the nuclear membrane is always a double membrane.
- The option stating "many membranes" is incorrect because the nuclear membrane consists of only two membranes.

5. **Correct Answer**: Therefore, the interphase nucleus is enclosed in a **porous double membrane**.

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