double-stranded DNA (dsDNA) into smaller fragments at specific points. They are a defence mechanism used by bacteria to cleave the DNA of invading viruses‚ thereby restricting their expression. The exploitation of restriction enzymes ability to cut large pieces of DNA into smaller fragments (called restriction fragments) and the highly specific way in which they do this has played a crucial role in the exponential advancement of biotechnology in recent decades. Restriction enzymes cut DNA at specific
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DNA is a tool of great use throughout the world. Especially when it comes to the field of forensic science‚ DNA is the most important tool of all. What is DNA? DNA‚ short for deoxyribonucleic acid‚ is a group of molecules that hereditary information in which guides development and functioning throughout the body. “DNA is to justice as a telescope is to the stars; not a lesson in biochemistry‚ not a display of the wonders of magnifying glass‚ but a way to see things as they really are.”(Barry Scheck
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DNA STRUCTURE AND FUNCTION QUIZ Provide answers to each of the following. You may consult your text and fellow students. Each numbered item counts 2 points. 1. If one strand of a DNA double helix has the sequence GTCCAT‚ what is the sequence of the other strand? a. ACTTGC b. CUGGTU c. CAGGTA d. CAGGUA e. TGAACG 2. If a strand of DNA has the sequence AAGCTC‚ transcription will result in a(n) ______. a. single DNA strand with the sequence TTCGAG
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Extracting DNA from Bananas In the Lab: Extracting DNA from Bananas‚ DNA was removed from bananas that had been blended with water in order to examine how DNA is seen from the naked eye. DNA stands for deoxyribonucleic acid‚ which is a nucleic acid that contains the sugar deoxyribose. DNA is made up of a series of monomers called nucleotides. Each nucleotide has three parts: a deoxyribose molecule‚ a phosphate group‚ and a nitrogenous base. In addition‚ there are four kinds of nitrogenous
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Who Discovered DNA? Heather Kane The discovery of deoxyribonucleic acid‚ more commonly known as DNA‚ has been the foundation for much scientific work. This fundamental discovery was credited to James Watson and Francis Crick. Many people believe that another person‚ Rosalind Franklin‚ also played a large role in the research. How much did she contribute to the discovery? Why is her name left unrecognized? This paper will discuss her part in the search and whether her name should appear next to
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Racism in Maycomb Many people gathered to watch Atticus Finch defend a black man‚ Tom Robinson in the hot Maycomb County Courtroom yesterday. "...That Negroe yonder took advantage of me‚" claimed Mayella Ewell. Tom Robinson has worked on Mr. Link Deas’s farm for eight years. "...that boy’s worked for me eight years an’ I ain’t had a speck o’ trouble outa him. Not a speck‚" stated Mr. Deas during the trial. While working on the farm‚ he had an accident with the cotton gin‚ leaving his entire
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DNA is the common name for Deoxyribonucleic acid. This is made up of nucleic acids containing deoxyribose (sugar)‚ consisting of complex molecules‚ present in the chromosomes of all plant and animal cells‚ and carrying in coded form instructions for passing on hereditary characteristics. The DNA molecule takes the shape of a double helix‚ a simple structure that resembles gently twisted ladders. The rails of the ladder are made of pairs of nitrogen-containing nucleotides‚ which are subdivisions
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D. DNA Name the four bases in DNA and describe the structure of DNA using the following terms: The four bases of DNA are adenine‚ thymine‚ guanine‚ and cytosine. nucleotide (sugar‚ phosphate‚ base) Sugar: pentose deoxyribose; phosphate: phosporic acid‚ nitrogen base (A‚ T‚ G‚ C) complementary base pairing A-T; G-C joined by hydrogen bonds. Purines (with double ring) always bond with a pyrimidine (single ring). double helix Double spiral; three dimensional hydrogen bonding Hydrogen
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tumors. These are malignant cells that can enter your blood stream or lymph system and can spread throughout your body. The following is a case study of a female patient who is twenty five years old with history of malignant neoplasm of the rectum and loop ileostomy. During her teenage years she thought she had a sensitive stomach due to the nausea and stomach discomfort. When she would explain her symptoms to her doctors they usually told her that she had irritable bowel syndrome. She decided to do
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DNA Technology: Biotechnology 1) Selective breeding a. 2) Genetic engineering – humans tinker with organisms genes a. Cloning –take haploid cel and replace with a diploid nucleus (comes from organism whos traits you want to duplicate. b. Recombinant DNA – DNA from 2 or more sources. Done by Euk cells during Meiosis. Always from same molecule. 3) Biologists first started doing recombinant DNA from a prok cell and combined it with another prok cell because it was easier. 4) DNA from a
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