Which is true regarding mRNA transcription and processing?Group of answer choicesA 7-methylguansoine cap is added to the 3’ end of an mRNA strand.The sequences in the mRNA strand that direct the activity of the spliceosome are located in the intron and the exon.The 5’ AAUAAA 3’ sequence that directs the addition of the polyA tail is added to the mRNA strand by polyadenylation factors.During splicing, a linkage is formed between one end of the intron, and a base in the middle of the intron, forming a looped RNA.

In what way(s) can mRNAs be processed?Group of answer choicesBy removing the introns (the noncoding regions) of the mRNAsBy splicing the exons (the coding regions) of the mRNAs in different waysAll of the aboveBy adding caps and tails to the ends of the mRNAs

When different mRNA molecules are produced from the same primary transcript, depending on which RNA segments are cut out.Group of answer choicesRNA processingspliceosomedomainalternative RNA splicingRNA splicingdeletionNext

Which is not part of the post-transcriptional modifications?*1 pointadding a 5' capadding a poly-A tailcutting out the exonscutting out the introns

Which one of the following is true about splicing?Group of answer choicesIn prokaryotes, splicing repressors prevent the recognition of a 3’ splice junction.Splicing activators are proteins with RNA binding activityDifferential splicing means that proteins can be produced with their domains in different orders.In eukaryotes, all cells produce one splicing pattern for a particular gene.

A large complex made up of proteins and RNA molecules that removes introns from mRNA.Group of answer choicestranscription initiation complexspliceosomeribozymesRNA polymerasepolyribosomeaminoacyl-tRNA synthetasetranscription factor