Question

What if a gene has 1 exon. What processing steps it will go through before becoming a mature mRNA? Will it go through splicing?

Answer 1

Ans:If a gene has only 1 exon then it will not go for splicing as splicing is a process wherein the introns which considered as junk because it is an non coding region of a gene.

In splicing, some sections of the RNA transcript (introns) are removed, and the remaining sections (exons) are stuck back together.Some genes can be alternatively spliced, leading to the production of different mature mRNA molecules from the same initial transcript.

The processing steps a pre-mRNA will go through before becoming a mature mRNA are as follows:

In humans and other eukaryotes, a freshly made RNA transcript (hot off the RNA polymerase "presses") is not quite ready to go. Instead, it's called a pre-mRNA and has to go through some processing steps to become a mature messenger RNA (mRNA) that can be translated into a protein. These include:

Addition of cap and tail molecules to the two ends of the transcript. These play a protective role, like a book's front and back covers.

Removal of "junk" sequences called introns. Introns are sort of like blank or messed-up pages made during a book's printing, which have to be removed in order for the book to be readable .

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