What is the main event during mRNA splicing? Addition of new exons to the mature mRNA molecule Addition of new introns to the mature mRNA molecule Removal of all exons from the pre-mRNA molecule Removal of exons and add introns from the pre-mRNA molecule Removal of introns and ligation of the exon of the pre-mRNA molecule
Question
What is the main event during mRNA splicing? Addition of new exons to the mature mRNA molecule Addition of new introns to the mature mRNA molecule Removal of all exons from the pre-mRNA molecule Removal of exons and add introns from the pre-mRNA molecule Removal of introns and ligation of the exon of the pre-mRNA molecule
Solution
The main event during mRNA splicing is the removal of introns and ligation of the exons of the pre-mRNA molecule.
Here are the steps:
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The pre-mRNA molecule is initially transcribed from the DNA in the nucleus. This pre-mRNA molecule contains both exons (coding regions) and introns (non-coding regions).
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The splicing process begins with the assembly of the spliceosome, a complex of proteins and small nuclear RNAs (snRNAs), on the pre-mRNA molecule.
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The spliceosome identifies the intron-exon boundaries. The introns are then cut out and the exons are joined together. This process is known as ligation.
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The spliced mRNA, now containing only exons, is then transported out of the nucleus and into the cytoplasm where it can be translated into a protein.
So, the main event during mRNA splicing is the removal of introns and ligation of the exons of the pre-mRNA molecule.
Similar Questions
To create a functional RNA, the pre-mRNA undergoes a process known as splicing. During the splicing process, the are removed and the remaining are connected to each other.
In what way(s) can mRNAs be processed?Group of answer choicesBy removing the introns (the noncoding regions) of the mRNAsBy splicing the exons (the coding regions) of the mRNAs in different waysAll of the aboveBy adding caps and tails to the ends of the mRNAs
Which is true regarding mRNA transcription and processing?Group of answer choicesThe 5’ AAUAAA 3’ sequence that directs the addition of the polyA tail is added to the mRNA strand by polyadenylation factors.A 7-methylguansoine cap is added to the 3’ end of an mRNA strand.During splicing, a linkage is formed between one end of the intron, and a base in the middle of the intron, forming a looped RNA.The sequences in the mRNA strand that direct the activity of the spliceosome are located in the intron and the exon.
Which of the following events occurs during transcription?View Available Hint(s)for Part AThe message in mRNA is translated into a protein.Those segments of the RNA strand that do not actually code for the protein are removed.A molecule of RNA is formed based on the sequence of nucleotides in DNA.A cap is added to the RNA molecule.mRNA binds to a ribosome in the cytoplasm.
What are the three main steps involved in the processing of pre-mRNA in eukaryotic cells? Phosphorylation, elongation, initiation 5' capping, splicing, 3' polyadenylation Glycosylation, elongation, translocation Splicing, translocation, translation Degradation, phosphorylation, translocation
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