Which of the following is the cell organelle/organelles in which replication, transcription and translation occur in a typical eukaryotic plant cell ?

Options

A. Nucleus
B. Chloroplast
C. Mitochondria
D. Ribosomees

Answer

To answer the question regarding which cell organelle or organelles are involved in replication, transcription, and translation in a typical eukaryotic plant cell, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Processes**:
- **Replication**: This is the process by which DNA makes a copy of itself. It primarily occurs in the nucleus of the cell.
- **Transcription**: This is the process of synthesizing RNA from a DNA template. This also occurs in the nucleus.
- **Translation**: This is the process of synthesizing proteins from mRNA. This occurs in the ribosomes, which can be found in the cytoplasm or on the rough endoplasmic reticulum.

2. **Analyzing the Options**:
- **Option 1: Nucleus**: The nucleus is where both replication and transcription occur. It contains the cell's genetic material and is essential for these processes.
- **Option 2: Chloroplast**: Chloroplasts are primarily involved in photosynthesis and do not play a significant role in replication or transcription of nuclear DNA.
- **Option 3: Mitochondria**: Mitochondria have their own DNA and can replicate independently. They also perform transcription and translation of their own genes, but they are not the primary site for the cell's overall transcription and translation processes.
- **Option 4: Ribosome**: Ribosomes are the sites of translation, where proteins are synthesized from mRNA. However, they do not participate in replication or transcription.

3. **Conclusion**:
- The nucleus is the primary organelle for replication and transcription, while ribosomes are crucial for translation. Mitochondria also play a role in replication, transcription, and translation of their own DNA but are not the main organelle for these processes in the cell as a whole.
- Therefore, the correct answer to the question is that replication and transcription occur in the nucleus, while translation occurs in the ribosomes. However, if the question is asking for a single organelle that encompasses all three processes, the nucleus is the best answer.

### Final Answer:
The main organelle where replication and transcription occur is the **Nucleus**, and translation occurs in the **Ribosomes**. If the question is looking for a single organelle, the answer would be **Nucleus**.

---