The common conservative sequences of splice sites on both sides of introns often are.()
A. 5’-GU,3’-AG
B. 5’-AG,3’-GU
C. 5’-GA,3’-UG
D. 5’-UG,3’-GA
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Post-transcriptional mRNA molecules in eukaryotes must be processed, which involving the removal of (), and combination of coding region to become the protein translation template. And this process is called RNA splicing.()
A. exon
B. promotor
C. initiation factor
D. intron
The methylation of histone is catalyzed by DNMT.()
The ubiquitylation of histone is associated with the activation of the gene.()
In eukaryotic cells, the methylation of cytosine only appears in CpG island.()