Biology DNA -DNA is better known as deoxyribonucleic acid -It is made up of small subunits known as nucleotides. -These nucleotides are further made up of a phosphate group‚ a deoxyribose sugar and a nitrogenous base. -DNA usually exists as a double-helix structure that is made up of 2 polynucleotide strands that run antiparallel to each other -These two polynucleotide strands are held together by interactions between the nitrogenous bases. These interactions are known as hydrogen bonds. -There are
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Associate Program Material DNA Worksheet Answer the following in at least 100 words: 1. Describe the structure of DNA. DNA molecules are composed of two strands that form a helical ascending spiral. They fit together like the opposing teeth of a zipper and are held together by weak interactions called hydrogen bonds. These two strands is a long string of subunits called nucleotides‚ each attached to the one immediately about it and the one immediately below it to form a long chain. Each
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It all led to March 17th‚ 1953 when Watson and Crick successfully solved the structure of DNA. They were able to prove the water content of the fibers and the placement of the phosphate sugars were on the outside of the helix. Also realized the the outside chains must go up and the others go down (Watson 206). Upon completion of their paper stating their findings‚ they shared it with a Sir Lawrence who “enthusiastically expressed his willingness to post it to Nature with
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January 1999 B io Factsheet Example glucose fructose galactose Number 39 Carbohydrates: Revision Summary Carbohydrates contain 3 elements: Carbon (C)‚ Hydrogen (H) and Oxygen (O). Thus‚ if we remove water from carbohydrates‚ all that remains is carbon. Carbohydrates can be divided into 3 categories; monosaccharides‚ disaccharides and polysaccharides (Table 1). Table 1. Structure of monosaccharides‚ disaccharides and polysaccharides Category Monosaccharide (made of 1 sugar molecule)
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http://www.nsta.org/main/news/stories/science_and_children.php?news_story_ID=47834 (23/0704) Ø Brian Knapp‚ 1991‚ science in our world flight‚ the Macmillan company of Australia pty. ltd.‚ 107 Moray street‚ south Melbourne 3205 Ø Helix [online] http://www.publish.csiro.au/helix/cf/issues/th64b4.cfm(25/07/04)
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numerous concepts yet for scientists to discover or understand‚ biology truly is an open ended book waiting for the students of today to write tomorrow’s chapters. Watson and Crick’s discovery of the DNA double helix in 1953 marked an era of extraordinary creativity in biology. In ‘The Double Helix’‚ James Watson reveals their struggles against anti-helical
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| Maximizing the Range and Power of Inductive Coupling | | | Isaiah Anderson | 1/11/2013 | | Abstract In this project I studied how an electrical current moving through a coil of wire can generate an electric magnetic field and power an electrical load connected to a similar coil of wire. This experiment has been performed before but the goal of this project was to increase the efficiency of the circuit. In this experiment multiple different coils were tested in order to find
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Rock Harmony (Andy Goldsworthy: “Rock Creation”) Richard Lipoczi Art 100 Jennifer Monroe 04/25/2013 Andy Goldsworthy is a British naturalist artist‚ mostly sculptor and photographer‚ creating in the twentieth and twenty-first centuries. He is still alive in these days. All his works draw on their themes from the nature: he uses only natural materials in their original environments to his works. He expresses his thoughts through transforming the natural matters to certain kinds of
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These ends can connect to an identical sequence cut by the same restriction enzymes or a very similar end. Blunt ends are created when a restriction enzyme cuts the double helix evenly. Materials One will need buffer solution‚ pipettes‚ an electrophoresis chamber‚ agarose‚ and three DNA samples consisting of an uncut sample‚ and a sample cut with EcoRI and one cut with HindIII to complete this lab. Methods To start things off
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Helical Gears Over Spur Gears Geometry • Smoother engagement of the gear teeth • More teeth carry load at a given time so th are more efficient they ffi i t – carry more load l d for f a given size Transverse Plane Tangent Plane Normal Plane ψ = Helix angle – 15°- 45° φt = Transverse Pressure angle φn = Normal Pressure a angle tan φn = tan φt * cos ψ Pitches • Circular Pitch – distance from a point on a tooth to corresponding point on next tooth p = πD/N • Normal Circular Pitch – distance between
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