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Friedrich Miescher collected bandages for his work and found a new molecule from the cells, it was called nuclei but he called it nuclein. It contained the oxygen , hydrogen, and nitrogen. His work is important because the nuclein was unrecognizable for many years. And was considered the "Father" of DNA.

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Rosalinda Franklin took two sets of a high revolution photos of crystallized DNA fibers and looked at what was shown on the x-rays and what has appeared is to be a helical structure. She made this discovery in July 25, 1920. Her work was important because in her discovery it's becoming well known today.

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Watson and Crick they discovered the double helix structure of DNA. It with sugar and phosphates that are forming the outer strands of the helix and the bases pointing to the center. Their work was important because they made there own discoveries.

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The nucleotide of DNA are a building blocks of the nuclei acids. The 3 parts of the nucleotide are nitrogenous base, Pentose sugar, and Phosphate group.

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They are attached to each other sugar rings, some of the four bases A,G,C, and T. They all bond together (also hydrogen) between the complementary bases hold all together to the two strands of DNA