Map do Sapling Learning Eukaryotic messenger RNA can undergo post synthetic proc
ID: 259962 • Letter: M
Question
Map do Sapling Learning 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 after the mRNA One mRNA can sometimes code but before it binds to the ribosome. by splicing at alternative sites. recognize the 5' and 3' splice site sequences. from the mRNA in the form of lariats, Splicing occurs while the mRNA enters the cytoplasm, for more than one protein Small RNA's in the splicesome In splicing, exon sequences are removed and are degraded. is attached to the spliceosome.Explanation / Answer
True statements are as follows:-
1. One mRNA .can sometimes code for more than one protein by splicing at alternatialternative sites.
2. Small RNA s in the spliceosomspliceosome recognise ththe 5' aand 3' splice sites sequence.
3. Splicing occurs while the mRNA is attached to ththe spliceosome.
False statements are as follow:-
Splicing occurs after the mRNA enters the cytoplasm but before binding to the ribosome. It is false as the spliceosome is present in the nucleus sothe process of splicing also occurs in nucleus.
2. In splicing exon sequences are removed from the mRNA in the form of lariats and are degraded. It is incorrect as the introns are removed and degraded. The exons are joied together.