Polynucleotide literally means many nucleotides. A nucleotide is a monomer or single unit of a stretch of a nucleic acid molecule, either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A bunch of nucleotides strung together make a polynucleotide. In comparison, an oligonucleotide means a few nucleotides. In practice, oligos are generally used as starting material for biochemistry experiments such as PCR or DNA sequencing, where a polymerase (note the "poly" prefix again) enzyme extends the short (generally under 30 nucleotides) oligonucleotide by adding nucleotides in a sequence specific manner; a polynucleotide is the product. A nucleotide is a monomer or the structural unit of nucleotide chains forming nucleic acids as RNA and DNA. A nucleotide consists of a heterocyclic nucleobase, a pentose sugar (ribose or deoxiribose), and a phosphate or polyphosphate group. ... Space-filling model of a section of DNA molecule Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions specifying the biological development of all cellular forms of life (and most viruses). ... Ribonucleic acid (RNA) is a nucleic acid polymer consisting of covalently bound nucleotides. ... Oligonucleotides are short sequences of nucleotides (RNA or DNA), typically with twenty or fewer base pairs. ... Wikipedia does not yet have an article with this exact name. ... part of a DNA sequence A DNA sequence (sometimes genetic sequence) is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, The possible letters are A, C, G, and T, representing the four nucleotide subunits of a DNA strand (adenine, cytosine, guanine... ITaq DNA polymerase A polymerase (EC 2. ...
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