A sestina, or sextain, is a poem comprised of six stanzas containing six lines each. These six-by-six stanzas are followed by a shorter (3-line) final stanza known as an envoi. This gives the sestina a total of 39 lines (6 * 6 + 3 = 39).
1 A nonsense mutation is a point mutation in a sequence of DNA that results in a premature stop codon, or a nonsense codon in the transcribed mRNA, and possibly a truncated, and often nonfunctional protein product.
mRNA is messenger RNA. mRNA is transcribed from DNA, and carries coding information to the ribosomes. Here, the RNA is translated into a protein.In mRNA genetic information is encoded in the sequence of nucleotides arranged into codons.Each codon encodes for a specific amino acid, except the stop codons that terminate protein synthesis.RNA is messenger RNA. mRNA is transcribed from DNA, and carries coding information to the ribosomes. Here, the RNA is translated into a protein.