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2 pages/≈550 words
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Life Sciences
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English (U.S.)
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Introduction to Life Science: Nature and Structure of DNA (Term Paper Sample)


You will be required to do a term paper on one of the topics listed below.
Discuss how the unique physical and chemical properties of water contribute to the importance of water for life on Earth to survive.
Discuss how the methods of experimentation and observation have changed throughout the history of science.
Explain the role so called “accidental” discoveries played in the history of science.
Describe the major experiments and scientists involved in the discovery of DNA as our hereditary material and its structure.
Explain what role women played in the Scientific Revolution of the 18th Century? What role do women in science play today?
This assignment will be worth 10% of your grade. Your paper should be creative, interesting and 2-4 pages (500-1,000 words) in length. It should be well-organized and demonstrate an orderly flow of information that clearly addresses the subject chosen.


Introduction to Life Science
Introduction to Life Science
The chemical nature and structure of DNA were not understood until mid-twentieth century. Before this time, scientists spent many years trying to understand which of the numerous types of molecules within cells comprised the hereditary material. Questions arose of whether it was protein, or even another molecule that had not yet been discovered. Ultimately, multiple experiments and scientists are responsible for the discovery of DNA hereditary material and structure (Portin, 2014).
One major experiment that contributed in the discovery of DNA as hereditary material was done in 1869 by a Swiss chemist known as Friedrich Miescher. Miescher was studying white blood cells when he isolated a molecule that was unknown before. The molecule was somewhat acidic and comprised of a high percentage of phosphorus. He named this molecule “nuclein” and this was later on changed to “nucleic acid” and finally to “deoxyribonucleic acid” or DNA (Portin, 2014). Surprisingly, Miescher had no idea that nuclein was the carrier of the hereditary material because he believed it did not have the variability essential to explain the diversity of organisms. In this way, like most scientists at the time, he believed that proteins carried the hereditary information (Gьз, 2004).
For several decades after Miescher’s discovery, scientists still felt that protein was the carrier of the hereditary material. However, in 1944, a biologist named Oswald Avery made a discovery while experimenting with the bacterial responsible

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