Question

Eukaryotic messenger RNA can undergo post synthetic processing after transcription and before translation. One of the processing steps is splicing, where portions of the RNA are removed and the remaining RNA are joined together. Classify the statements regarding mRNA splicing as true or false.

Answer 1

The correct answers are:

A-splicing occurs while the mRNA is attached to the nucleosome - "False"

B-in splicing, intron sequences are removed from the mRNA in the form of lariats (loops), and are degraded - "True"

C-one mRNA can sometimes code for more than one protein by splicing at alternative sites - "True"

D-splicing of mRNA does not involve any proteins - "False"

E-splicing occurs while the mRNA is still in the nucleus - "True"

Step-by-step explanation:

Splicing is a key biological process that allows messenger RNA (mRNA) maturation at which uncoding regions of the RNA are removed (introns) while the coding regions of the RNA are joined together (exons). Splicing occurs in the nucleus when the mRNA has been removed from the nucleosome and it is available to be recognized by the proteins involved in this process (proteins that comprise the splicesome). During splicing, the introns are removed in the form of lariants that are later degraded by the cell. Splicing is one of the processes that allows that one mRNA could code for more than one protein by removing introns at different sites.