Question

Are introns removed?

Answer 1

Introns

1. The non-coding sequences of DNA or RNA that are not involved in protein synthesis are called introns.
2. These are intervening sequences present along with the coding sequences or exons in DNA.
3. They help in gene regulation and expression. It also promotes genetic recombination.

Splicing

1. The process by which the non-coding introns are removed from RNA transcript with the subsequent joining of coding sequences or exons during protein synthesis is called splicing.
2. Splicing occurs by aggregated action of several proteins inside the nucleus.
3. The introns are cut and removed while the exons are joined to form a mature RNA transcript.
4. Introns do not directly code for proteins but play an important role in regulating and maintaining the protein synthesis process.
5. After the process of transcription, the introns are removed from the premature RNA.