The Discovery of the Structure of DNA Essay Example | Topics and Well Written Essays - 3000 words

The Discovery of the Structure of desoxyribonucleic acid - Essay ExampleDNA harps of ii strands, each composed of certain sugars and phosphates. The two strands wind near each other in a spiral, much like the two sides of the ladder wind virtually each other. Linking the two strands together are certain chemical elements called amines or institutes arranged in a particular pattern. The rungs of the rubber ladder would be like these chemical links, (Ciccarelli p.252).An understanding of DNA is a fundamental frequency necessity in understanding what it is that makes us who we are. Not the acts which we commit, but really who were imbedded in the core of ourselves. Ultimately, the transmitted design of us as human beings is what truly the history book is as it comes to humans and what makes them who they are. morphological DNA is described as, Some regions of chromosomes remain highly condensed, tightly coiled, and untranscribed throughout the cell cycle. Called constitutive hete rochromatin, these portions hunt down to be localized around the centromere, or located near the ends of the chromosome, at the telomeres, (Johnson p.387).After Rosalind Franklins use of roentgenogram technology as it came to DNA, the world would be introduced to two gentlemen by the names of James Watson and Francis Crick. Learning conversationally of Franklins results before they were published in 1953, James Watson and Francis Crick, two young investigators at Cambridge University, quickly worked out a likely building for the DNA molecule (figure 14.10), which we now know was substantially correct. They analyzed the problem deductively, send-off building models of the nucleotides, and then trying to assemble the nucleotides into a molecule that matched what was known about the structure of DNA. They tried and true various possibilities before they finally hit on the idea that the molecule might be a simple double helix, with the bases of two strands pointed inward towards eac h other, forming base-pairs, Elaborating further that, In their model, base pairs always consist of purines, which are large, pointing toward pyrimidines, which are small, keeping the diameter of the molecule a constant 2 nanometers. Because the atomic number 1 bonds offer form between the bases in a base-pair, the double helix is stabilized as a semidetached house DNA molecule composed of two antiparallel strands, one chain running 3 to 5 and the other 5 to 3. The base pairs are planar (flat) and stack 0.34 nm apart as a result of hydrophobic interactions, lend to the overall stability of the molecule, (Johnson p.287).The Watson-Crick model explained why Chargaff had obtained the results he had in a double helix, adenine forms two hydrogen bonds with thymine, but it will not form hydrogen bonds properly with cytosine. Similarly, guanine forms three hydrogen bonds properly with thymine. Consequently, adenine and thymine will always occur in the same proportions in whatsoever DNA molecule, as will guanine and cytosine, because of this base-pairing, (Johnson p.287).Just as any scientist needs to do in order to prove their theory Crick and Watson set out to do just that. In previous(a) February of 1953, Crick and Watson built a model out of tin established the general structure of DNA. This structure explained all the known chemical properties of DNA, and it opened the door to understanding its biological functions. There have been little amendments to that first published structure, but its