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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Part of introns in eukaryotic cells have branch points, and around these points are some conservative sequences binding with the U2 splicesome.()
The tRNA and rRNA moleclues of eukaryotic cells also need to be spliced.()
Which of the following description is correct about type I self splicing intron?()
A. The free guanine activate the transesterification and then covalently bound at 5' terminus of the intron
B. The intron can form the lariat
C. It’s a common splicing way of mammals’ mRNA
D. There’s no adenine in sequences of introns
Which of the following description is incorrect about spliceosome snRNP’s function?()
A. U1: pair with the 5 'splice site of mRNA precursor
B. U2: pair with conservative sequence near the branch point
C. U4: pair with the 3 'splice site of mRNA precursor
D. U5: interact with the last nucleotide of introns’ upstream exons and the first nucleotide of introns’ downstream exons
E. U6: combine with the 3 'splice site of introns and catalyze the transesterification
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