Fill in the Blanks Below

Essay

Fill in the blanks below.
During gene expression, the initial RNA transcript needs to undergo processing to make a mature RNA, either a ____1____ RNA or a ____2___ RNA. For many of our genes, the initial RNA transcript needs to be cleaved into pieces. Some of the pieces, called ____3____, are discarded, but other alternating pieces called ___4____ are retained and fused in the same linear order as their order when transcribed. The junctions between ___4____ and ____3____ contain some highly conserved nucleotides, notably a ____5____ dinucleotide at the beginning of ___3____ and an ___6____ dinucleotide at the ends of ____3____. For ____4_____ and _____3_____ the original definitions have been broadened to include the corresponding segments of _____7_____ ____8______