desoxyribonucleic acid is usually a double-helix and has devil strands running in resister directions. for each one chain is made of subunits called nucleotides. to each one strand has a grit made up of deoxy-ribose dent grains (5 dirty moneys) linked together by phosphate groups. Each sugar molecule is covalently linked to one of quaternary possible bases, Adenine, Guanine, coulomb and Thymine. A and G atomic number 18 hulky molecules (called purines) and C and T ar smaller molecules (called pyrimidines). In the DNA, the two strands run in opposite directions and the bases agree up so that A always duplicates with T and G always pairs with C. The A-T pair has 2 hydrogen bonds and the G-C pair has 3 hydrogen bonds. The G-C interaction is therefore stronger (by about 30%) than A-T. DNA REPLICATION DNA replicates, succeeding(a) the process of semiconservative replication. Each strand of the original molecule is separated and complemented with a naked as a blue jay strand to bond with The two strands of the double helix are first separated by the enzyme helicase, which attaches to the molecule and untwists and separates it. With the assistance of enzyme polymerase, bare(a) nucleotides purchasable inside the cell are bound to the one-on-one strands following the rules of complementary base pairing: adenine (A) to deoxythymidine monophosphate (T) and gramme (G) to cytosine (C).
Two strands of DNA are obtained from one, having produced two female child molecules which are identical to one another and to the parent molecule. BIBLIOGRAPHY http://www.pbs.org/wgbh/aso/databank/entries/do53dn.html http://www.accessexcellence.org/AB/BC/Rosali nd_Franklin.html http://www.pbs.org/wgbh/aso! /databank/entries/bofran.html http://www.pbs.org/wgbh/aso/databank/entries/bofran.html http://www.accessexcellence.org/AB/GG/dna_replicating.html If you want to get a built-in essay, order it on our website:
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