Which statement best states the need for RNA splicing? It protects pre-mRNA from
ID: 95703 • Letter: W
Question
Which statement best states the need for RNA splicing?
It protects pre-mRNA from harmful ribonucleases found within the cytoplasm.
It removes non-coding sequences and joins together coding sequences of RNA.
It limits the amount of RNA that needs to be transcribed from DNA.
It adds more than 200 adenine nucleotides to help dock RNA on the ribosome.
a)It protects pre-mRNA from harmful ribonucleases found within the cytoplasm.
b)It removes non-coding sequences and joins together coding sequences of RNA.
c)It limits the amount of RNA that needs to be transcribed from DNA.
d)It adds more than 200 adenine nucleotides to help dock RNA on the ribosome.
Explanation / Answer
Correct answer is b) that is it removes non-coding sequences and joins together coding sequences if RNA.
A is wrong because protection of m-rna from harmful ribonucleases in the cytoplasm is done by 5' cap in mrna.
D is wrong because adenine nucleotide is added by poly A polymerase on mrna to help dock RNA on the ribosomes.
C is one of reasons that splicing occurs, because of splicing different type of mrna sequences are possible and because of that the mrna production needed for different proteins is less due to splicing but the removal of introns is the most important things for cell to produce protein. So it is the best statement to describe splicing here.
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