Please give the correct order for the following steps of RNA capping process:①7’-methylation of guanosine.②Removal the last phosphate at 5’ terminal of pre-mRNA③The GMP cap is added to the pre-mRNA④The second nucleotide is methylated()
A. 1,2,3,4
B. 2,3,1,4
C. 1,4,3,2
D. 2,4,1,3
E. 4,3,2,1
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The enzyme that catalyze the generation of poly A tail in mRNA 3 ' terminal is:()
A. Restriction enzyme
B. Guanylyl transferase
C. RNase P
D. RNA polymerase II
E. poly(A) polymerase
Which of the following description is NOT correct about the post-transcriptional processing of mRNA:()
A. The m7GpppNmp cap should be added to the 5’ end of precursor mRNA.
B. The splicing process is needed for precursor mRNA.
C. The poly(U) tail should be added on the 3’ end of precursor mRNA.
D. The mRNA precursor can be methylated in higher organisms.
The cap structure of mRNA in eukaryotic cells is.()
A. 7- methyl guanine nucleoside triphosphate
B. 7- methyl uracil nucleoside triphosphate
C. 7- methyl adenine nucleoside triphosphate
D. 7- methyl cytosine nucleoside triphosphate
The post-transcriptional processing of mRNA in eukaryotic cells does not include:()
A. The CCA-OH is added on it
B. The cap structure is added on the 5’ terminal
C. The poly(A) tail is added on the 3’ terminal
D. The splicing of introns
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