This part of nucleus is in contact with endoplasmic reticulum

Options

A. Outer membrane
B. inner membrane
C. Pore
D. Chromatin

Answer

To answer the question "This part of the nucleus is in contact with the endoplasmic reticulum," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Nucleus**:
- The nucleus is a membrane-bound organelle that contains the genetic material of the cell. It has a double membrane structure, consisting of an outer membrane and an inner membrane.

2. **Identify the Membranes**:
- The outer membrane of the nucleus is continuous with the endoplasmic reticulum (ER). The ER itself has two forms: rough and smooth. The rough ER is characterized by the presence of ribosomes on its surface.

3. **Evaluate the Options**:
- **Option 1: Outer Membrane**: This is the correct answer because the outer membrane of the nucleus is directly in contact with the rough endoplasmic reticulum.
- **Option 2: Inner Membrane**: This option is incorrect. The inner membrane does not contact the endoplasmic reticulum; instead, it provides structural support and assists in DNA repair.
- **Option 3: Pores**: This option is also incorrect. Nuclear pores are structures that allow the passage of molecules in and out of the nucleus but do not contact the endoplasmic reticulum.
- **Option 4: Chromatin**: This option is incorrect as well. Chromatin is a complex of DNA and proteins found within the nucleus but is not involved in direct contact with the endoplasmic reticulum.

4. **Conclusion**:
- Based on the evaluation of the options, the correct answer is **Option 1: Outer Membrane**.