Splicing is the process of removing introns and joining exons in a defined order in a transcription unit. This process takes place in the nucleus of eukaryotic cells and is mediated by a complex called the spliceosome.

Explanation:

• Transcription is the process of synthesizing RNA from a DNA template. During transcription, the entire DNA sequence is transcribed into RNA, including both the introns and exons.

• Introns are non-coding sequences within a gene, while exons are the coding sequences that specify the amino acid sequence of a protein. Introns need to be removed from the RNA sequence before translation can occur.

• Splicing is the process of removing introns and joining exons in a defined order, resulting in a mature messenger RNA (mRNA) molecule that can be translated into a protein.

• The splicing process is mediated by the spliceosome, a complex that consists of small nuclear RNAs (snRNAs) and proteins. The snRNAs base-pair with the intron sequences, while the proteins catalyze the chemical reactions that remove the introns and join the exons.

• Splicing is essential for the proper expression of genes, as it allows for the creation of multiple protein variants from a single gene by alternative splicing. Mutations that affect splicing can lead to a variety of diseases, including cancer and genetic disorders.

In conclusion, splicing is the process of removing introns and joining exons in a defined order in a transcription unit, and it is essential for the proper expression of genes.

Capping as it denotes it's a precursor process in which the methylguanophosphate is added to 5' end of mRNA.Tailing is the addition of amino acyl derivatives (3AA)or 3AMP i.e.Adenosinemonophosphate at the 3'end of mRNA. Transformation is the change in genetic material from RNA back to DNA and vice versa.Splicing is the removal of introns in order to join the exons which identify specific base sequence required for translation (protein synthesis).This is not a book copy or i am not find it on Google or elsewhere, this is my own answer.So you can use it in board exams if asked,it'll surely help you because board tests your aptitude and reasoning not knowledge or how much time you read it from books(You may called It "Ratta")It might be helpful for board students.