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A gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis. gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis.
Once a DNA sequence has been transcribed as a hnRNA strand, the introns will be spliced out. The resulting mRNA sequence will then be translated into a protein. A spliceosome is a complex of specialized RNA and protein subunits that removes introns from a transcribed hnRNA (often called pre-mRNA) segment.This process is generally referred to as splicing.nce a DNA sequence has been transcribed as a hnRNA strand, the introns will be spliced out. The resulting mRNA sequence will then be translated into a protein. A spliceosome is a complex of specialized RNA and protein subunits that removes introns from a transcribed hnRNA (often called pre-mRNA) segment.