The cell organelle that is continuous with the outer membrane of the cell brain is

Options

A. mitochondria
B. ER
C. Golgi complex
D. lysosome

Answer

To solve the question about which cell organelle is continuous with the outer membrane of the cell nucleus (often referred to as the "cell brain"), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Cell Organelles**: The question asks for a specific organelle that is continuous with the outer membrane of the nucleus. We need to consider the options provided.

2. **Evaluate the Options**:
- **Mitochondria**: This organelle is known as the powerhouse of the cell and is responsible for energy production. It is not connected to the nucleus, so this option is incorrect.
- **Endoplasmic Reticulum (ER)**: The ER is a network of membranes that is indeed continuous with the outer membrane of the nucleus. It comes in two forms: rough ER (with ribosomes) and smooth ER (without ribosomes). This option is likely correct.
- **Golgi Complex**: This organelle is involved in the modification, sorting, and packaging of proteins. It is not directly connected to the nucleus, making this option incorrect.
- **Lysosome**: Lysosomes are involved in digestion and waste removal within the cell. They do not connect to the nucleus, so this option is also incorrect.

3. **Conclusion**: Based on the evaluation of the options, the correct answer is the **Endoplasmic Reticulum (ER)**, as it is the only organelle that is continuous with the outer membrane of the nucleus.

### Final Answer:
The cell organelle that is continuous with the outer membrane of the cell nucleus is the **Endoplasmic Reticulum (ER)**.

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