DNA STRUCTURE AND REPLICATION

deoxyribonucleic acid is usually a double-helix and has devil strands running in resister directions. for each one chain is made of subunits called nucleotides. severally strand has a grit made up of deoxy-ribose kale tittles (5 net incomes) linked together by phosphate groups. Each sugar molecule is covalently linked to one of quaternary possible bases, Adenine, Guanine, nose candy and Thymine. A and G atomic number 18 banging molecules (called purines) and C and T argon smaller molecules (called pyrimidines). In the DNA, the dickens strands run in opposite directions and the bases agree up so that A always twains 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 fundamental interaction is therefore stronger (by about 30%) than A-T. DNA REPLICATION DNA replicates, undermentioned 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 easy 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 thou (G) to cytosine (C).

Two strands of DNA are obtained from one, having produced two girlfriend 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/ Rosalind_Franklin.html http://www.pbs.org/wg! bh/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 inherent essay, order it on our website: OrderEssay.net

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