In eukaryotic cell, transcription, RNA splicing and RNA capping take place in:

Options

A. Nucleus
B. Cytoplasm
C. Ribosomes
D. Golgi body

Answer

To answer the question, "In eukaryotic cells, transcription, RNA splicing, and RNA capping take place in:", we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Eukaryotic Cells**: Eukaryotic cells have a defined nucleus where genetic material (DNA) is housed. This is different from prokaryotic cells, which lack a true nucleus.

2. **Transcription Process**: In eukaryotic cells, transcription is the process where the DNA sequence is copied into messenger RNA (mRNA). This process occurs in the nucleus.

3. **RNA Splicing**: After transcription, the initial mRNA (pre-mRNA) undergoes splicing. This involves the removal of non-coding regions (introns) and the joining together of coding regions (exons) to form mature mRNA. This splicing also occurs in the nucleus.

4. **RNA Capping**: Capping is the addition of a methylated guanine cap at the 5' end of the mRNA molecule. This cap is important for mRNA stability and is also performed in the nucleus.

5. **Conclusion**: Since all these processes (transcription, RNA splicing, and RNA capping) occur in the nucleus of eukaryotic cells, the correct answer is the nucleus.

### Final Answer:
In eukaryotic cells, transcription, RNA splicing, and RNA capping take place in the **nucleus**.

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