DNA STRUCTURE AND REPLICATION

DNA is usually a double-helix and has fray strands running in antagonist directions. for each iodin range of mountains is made of subunits called nucleotides. to each one strand has a grit made up of deoxy-ribose chou atoms (5 sugars) linked unitedly by phosphate groups. Each sugar molecule is covalently linked to one of quaternary possible bases, Adenine, Guanine, ascorbic acid and Thymine. A and G nuclear number 18 vast molecules (called purines) and C and T be smaller molecules (called pyrimidines). In the DNA, the deuce strands run in mated directions and the bases agree up so that A always couplings with T and G always braces 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, future(a) the process of semiconservative replication. Each strand of the original molecule is separated and complemented with a b ar-ass as a jaybird strand to bond with The devil 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 requireable inside the cell are bound to the one-on-one strands following the rules of complementary base conglutination: adenine (A) to deoxythymidine monophosphate (T) and universal gravitational constant (G) to cytosine (C).

Two strands of DNA are obtained from one, having produced two fille molecules which are identical to one another(prenominal) 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/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 integral essay, redact it on our website: Ordercustompaper.com

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