The following is a portion of an mRNA sequence: 3′ – AUCGUCAUGCAGA – 5′ a. During transcription was the adenine at the left-hand side of the sequence the first or the last nucleotide added to the portion of the mRNA shown? b. Write out the sequence and polarity of the DNA duplex that encodes this mRNA segment. Label the template and coding DNA strands. On your DNA duplex above indicate in which direction you would find the promoter region for this gene.