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Removal of introns in a transcription un...

Removal of introns in a transcription unit is :

A

Transformation

B

Splicing

C

Tailing

D

Capping

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Transcription Unit**: In eukaryotic cells, the initial RNA transcript produced from DNA is called heterogeneous nuclear RNA (hnRNA). This RNA contains both coding and non-coding regions. 2. **Identifying Introns and Exons**: Within the hnRNA, there are segments known as exons, which code for proteins, and introns, which do not code for proteins. Introns are the non-coding regions that need to be removed to produce a functional mRNA. 3. **The Process of Splicing**: The removal of introns from the hnRNA occurs through a process called splicing. During splicing, the introns are cut out, and the exons are joined together to form a continuous coding sequence. 4. **Finalizing mRNA**: After splicing, the resulting RNA molecule consists only of exons and is referred to as mature mRNA. This mRNA is then further processed by adding a 5' cap and a poly-A tail at the 3' end for stability and protection. 5. **Conclusion**: Therefore, the removal of introns in a transcription unit is specifically termed "splicing." **Final Answer**: The removal of introns in a transcription unit is called **splicing**. ---
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