DNA and Biotechnology (3rd Edition) - download pdf or read online

By Molly Fitzgerald-Hayes, Frieda Reichsman

ISBN-10: 008091635X

ISBN-13: 9780080916354

Acceptable for a variety of disciplines, from biology to non-biology, legislations and nursing majors, DNA and Biotechnology makes use of an easy and entire writing kind that offers the knowledgeable layperson a survey of DNA via proposing a quick historical past of genetics, a transparent define of recommendations which are in use, and highlights of breakthroughs in scorching subject clinical discoveries.

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Extra info for DNA and Biotechnology (3rd Edition)

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The two ribbons symbolize the two phosphate—sugar chains, and the horizontal rods the pairs of bases holding the chains together. 14 Dr. Francis H. C. Crick and wife Odile. In 2003, Odile and Dr. Francis H. C. Crick attended a dinner in La Jolla, California, honoring the 50th anniversary of the discovery of the structure of DNA by Dr. Crick and James D. Watson. Mrs. Crick’s original sketch of a DNA double-helix structure appeared in the famous paper in the journal Nature in 1953 ( right). The contributions to science made by Watson, Crick, Franklin, and Wilkins were original and carried the impact sufficient to merit a place in the annals of scientific fame; the DNA double helix became the charter molecule of molecular biology.

How were the bases oriented in the center so they would fit together perfectly? 9 Maurice Wilkins. Wilkins shared the Nobel Prize with Watson and Crick for solving the structure of DNA. 34 nm DNA helix has ten base pairs per turn. 10 DNA helix dimensions derived from x-ray diffraction. 0-nm diameter. 0-nm diameter of DNA with different combinations of base pairs. He finally had a model with each base lined up to pair with itself, A-A, C-C, and so on. Jerry Donohue, a former student of Linus Pauling, pointed out to Watson that his model had the bases in their enol forms, as suggested by the textbooks at the time.

These components make up the nucleotides, the building blocks of a DNA strand. Studies by Chargaff indicated that the amounts of the DNA bases vary in different organisms, suggesting that organisms may be different because their DNAs are different. Regardless of the source of the DNA, however, Chargaff found that the amount of adenine (A) always equals the amount of thymine (T) and the amount of guanine (G) always equals the amount of cytosine (C). These and other experimental data made essential contributions to solving the puzzle of DNA structure, which was published by Watson and Crick in 1953.

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DNA and Biotechnology (3rd Edition) by Molly Fitzgerald-Hayes, Frieda Reichsman

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