Which statement is incorrect?
a.In eukaryotes, transcription and translation takes place in the cytoplasm
b.In eukaryotes, a methylated guanine is added in the 5 end of a pre-mRNA
c.In eukaryotes, a polyadenine tail is added to the 3 end of a pre-mRNA
d.In eukaryotes, the non-coding introns are spliced out during RNA processing
e.During transcription, a DNA strand serves as a template for RNA synthesis