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Structure of DNA Free Essay, Term Paper and Book Report

What is the definition of DNA? “DNA is a double-stranded molecule held together by weak hydrogen bonds between base pairs of nucleotides. The molecule forms a double helix in which two strands of DNA spiral about one other. The double helix looks something like an immensely long ladder twisted into a helix, or coil. The sides of the "ladder" are formed by a backbone of sugar and phosphate molecules, and the "rungs" consist of nucleotide bases joined weakly in the middle by the hydrogen bonds. “(www.medicinenet.com) The study of Deoxyribonucleic Acid dates back to the late 1800’s. The paragraphs below will describe the journey of several scientists whom studied different people’s theories and data to finally formulate the structure of DNA, which has been described as the most profound discovery in the 20th century that has revolutionized modern medicine. In 1868 a Swiss Biologist, Friedrich Miescher studied the nuclei of cells. He studied and tested the pus obtained on surgical bandages. Miescher discovered phosphorous substance on the bandages, that he named nuclein. ......

Word Count: 875
Page Count: 3.5  (250 words a page / double spaced)

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