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.
Best Answer: mRNA is a molecule of RNA encoding a chemical blueprint for a protein product. mRNA is transcribed from a DNA template, and carries coding information to the sites of protein synthesis: the ribosomes. mRNA is a single stranded molecule transcribed from the template strand of DNA by RNA polymerase. It's role is to carry information, in the form of codons, from the nucleus into the cytoplasm, where translation of that message occurs. tRNA contains an anti-codon on one of its arms that can bind to a codon on the mRNA.