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Let's take a closer look at what happens during transcription. ... That is, it can only add RNA n...

By convention, upstream and downstream relate to the 5' to 3' direction respectively in which RNA...

Then, a sequence of adenine nucleotides called a poly-A tail is added to the 3' end of the mRNA m...

What happens at the 3' end? a. the 5' end is synthesized first; it receives a 5' cap, a modified ...