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DNA - The Double Helix

DNA - The Double Helix
Lists of Nobel Prizes and Laureates DNA - The Double Helix Play the DNA - The Double Helix Game About the game Most living organisms have the same sort of genetic material, DNA, in their cells. DNA contains two strands wrapped around each other in a helix, and these strands are held in place by four chemicals called bases: adenine (A), guanine (G), cytosine (C) and thymine (T). The Nobel Prize The 1962 Nobel Prize in Physiology or Medicine was awarded for the discovery of the molecular structure of DNA – the double helix. Reading The Discovery of the Molecular Structure of DNA - The Double Helix » Share this: 82 To cite this pageMLA style: "DNA - The Double Helix". Recommended: The Legacy of Alfred Nobel On 27 November 1895 Alfred Nobel signed his last will in Paris. Play the Blood Typing Game Try to save some patients and learn about human blood types! Unlocking the Secrets of Our Cells Discover the 2012 awarded research on stem cells and cell signalling. Contact E-mail us Press Newsroom Sitemap Terms

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Transgene Pflanzen Es gibt noch weitere Methoden zur Herstellung transgener Pflanzen: 1. Anstelle von Blattstückchen kann man auch Protoplasten (isolierte Zellen ohne Zellwand) benutzen. Man hält sie solange in Gewebekultur, bis sie eine neue Zellwand gebildet haben (bei Tabak etwa 2 Tage). Dann gibt man Agrobakterien zu und setzt die Gewebekultur fort. 2. Kennemerduinen Met zijn afwisselende landschap en rijke planten- en dierenwereld is het nationaal park een heerlijke plek om te wandelen of te fietsen. Op steenworp afstand van de drukke randstad ligt hier nog een prachtig stuk natuur. Er zijn twaalf ingangen. De meeste ingangen liggen in de binnenduinrand, maar in het westen is het gebied ook via strandopgangen toegankelijk.

Le code génétique Le code génétique : lecture du tableau Gilles Furelaud Article publié en février 2003 I- Introduction L'information génétique est conservée par la cellule au niveau de son ADN. Cette information est transcrite en ARNm, puis traduite en protéines.

Cours ADN 3- Les nucléotides À la fin des années 20, Phoebus Levine (1869-1940) avait déterminé que l'ADN contenait un glucide appelé désoxyribose, du phosphore et des bases azotées. Ces molécules peuvent s'assembler pour former des nucléotides. Comme nous le verrons, l'ADN est un polymère de nucléotides. Un nucléotide est une molécule formée de trois parties:

Grundkenntnisse der Pflanzenzüchtung im Überblick Möchte man einen allgemeinen Überblick in die Pflanzenzüchtung gewinnen, so sollte man sich an folgenden Themengebieten orientieren: Verschiedene Züchtungsmethoden, Einblicke in Labor- bzw. Gentechnik und die fünf übergeordneten Zieldefinitionen der Pflanzenzüchtung (Ertragssteigerung, Anpassungsfähigkeit, Qualitätssteigerung, bessere Stoffaufnahme und Resistenzen) Geschichte Der Beginn des Anbaus von Pflanzen und somit auch der Pflanzenzüchtung begann vor rund 12.000 Jahren in Mesopotamien (heute größtenteils Irak) mit Gerste (Hordeum vulgare) sowie Emmer (Triticum dicoccum) und Einkorn (Triticum monococcum), den Urformen des Weizens (Triticum aestivum), später auch Roggen (Secale cereale). Hier wurden erstmals gezielt Pflanzen der genannten Arten ausgewählt und unter kontrollierten Bedingungen angebaut. Seit etwa 5.500 vor Chr. ist der Anbau von Getreide auch in Mitteleuropa bekannt.

Reflections I quite like making posters (graphorisms, if you will), to collect up ideas from readings, articles, science and the like. I find orgnising the thoughts into something visual and attractive helps clarify them for myself and they add a splash fo colour to otherwise texty blogposts. I often attach them to tweets, and these tend to generate more interaction that text links alone. I usually use the Creative Commons search to find suitably-licensed Flickr images (if I don’t have my own). I edit them in GoogleSlides, using a partly-transparent text box at the bottom for citations and the ColorZilla Chrome colour picker add-on to match the colour palette.

Evolution Extension: Hominoid Drawings The seven drawings available for downloading from this site, in PDF format, were drawn by Ryan Scott McCullar*, for Martin Nickels at Illinois State University. Each one is a full scale profile, identified, and with a metric ruler for convenience (and to confirm the scale). If you can use a laser printer (e.g. at your district office, school, or local library), your results should be of very good quality, although inkjet printouts should be quite usable. A fast internet connection would also facilitate your downloading success. Each drawing requires about 100K of memory, so, in order to speed up the download time, they are available separately, and must be downloaded as seven separate items.

Cellular Visions: The Inner Life of a Cell What can character animators learn from those who render microscopic worlds in 3D? Plenty. The Inner Life of a Cell, an eight-minute animation created in NewTek LightWave 3D and Adobe After Effects for Harvard biology students, won't draw the kind of box office crowds that more ferocious—and furrier—digital creations did last Christmas. But it will share a place along side them in SIGGRAPH's Electronic Theatre show, which will run for three days during the 33rd annual exhibition and conference in Boston next month. Created by XVIVO, a scientific animation company near Hartford, CT, the animation illustrates unseen molecular mechanisms and the ones they trigger, specifically how white blood cells sense and respond to their surroundings and external stimuli.

Donald Clark Plan B “The invention of printing, though ingenious, compared with the invention of letters is no great matter” said Thomas Hobbes. He was right, as the invention of the writing is the big bang of learning technology as it led to a still expanding universe of knowledge. Writing allows us to transcend memory. We create and store written content and others can distribute, retrieve, access, read, communicate and search other people’s stored creations through this medium. Escherichia coli long-term evolution experiment The 12 evolving E. coli populations on June 25, 2008 The E. coli long-term evolution experiment is an ongoing study in experimental evolution led by Richard Lenski that has been tracking genetic changes in 12 initially identical populations of asexual Escherichia coli bacteria since 24 February 1988.[1] The populations reached the milestone of 50,000 generations in February 2010[update]. Since the experiment's inception, Lenski and his colleagues have reported a wide array of genetic changes; some evolutionary adaptations have occurred in all 12 populations, while others have only appeared in one or a few populations. One particularly striking adaption was the evolution of a strain of E. coli that was able to use citric acid as a carbon source in an aerobic environment.[2] Experimental approach[edit] Methods[edit]

Lesson: Nat. of Sci. mini-lesson: Checks Lab Before Doing this lab, consider doing the NEW High-Tech Version: The E-Mail Lab. (Details below under EXTENSIONS AND VARIATIONS. TEACHER PREPARATIONS: 1. Because this lesson provides an excellent opportunity to understand important elements of the Nature of Science , be sure to read our General Background Information, with our Rationale and our Approach, and tips for Presenting the lessons for maximum effect and Dispelling some of the popular myths about science. 2. Developing Independent Learners – The 7 Monkeys! The 15 minute forum tonight was led by our two science NQTs – Faye Hedley (@f_hedley) and Becky Owen. They shared a strategy they have been using called ‘The 7 Monkeys’. The 7 Monkeys is a way of enabling students to learn a concept, process or idea independently with minimal teacher input. Each ‘monkey’ is a different activity that the students undertake to support their learning. The end point is studentts answering a question with a piece of extended writing. Why monkeys?

Human Physiology - Respiration BIO 301Human Physiology Respiration Respiratory System: Primary function is to obtain oxygen for use by body's cells & eliminate carbon dioxide that cells produce Includes respiratory airways leading into (& out of) lungs plus the lungs themselves Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange) Respiratory system

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