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 joined together. Sort the following statements regarding mRNA splicing as true or false. True statements False statements

Splicing occurs while the mRNA is attached to the spliceosome

Splicing occurs after the mRNa enters the cytoplasm but before it binds to the ribosome

Proteins in the splicesome recognize the 5 and 3' splice site sequences

One mRNA can sometimes code for more than one protein by splicing at alternative sites.

RNA splicing is a process of RNA processing in which a precursor messenger RNA (pre-mRNA) transcript is transformed into a mature messenger RNA (mRNA) by removal of introns and linkage of exons.

Spliceosome is a complex machinery that performs splicing (removal of the introns from the primary mRNA transcript) and alternative splicing (re-combination of different exons which increases genetic diversity). Spliceosome is composed of small nuclear RNAs (five of them) and proteins that together make snRNPs-small nuclear ribonucleo proteins.

Spliceosome is a ribozyme, meaning that RNAs inside are capable of catalyzing reactions. Catalyzed reactions by spliceosome are the removal of introns, and the ligation of the exons.