History of DNA WebQuest 1. Friedrich (Fritz) Miescher http://www.dnai.org/timeline/index.html Find Miescher on the timeline and click on the bucket with the Red Cross to watch the animation. In 1869‚ he extracted a substance from white blood cells that he called nuclein. What do you think he was actually extracting? 2. Frederick Griffith http://biology.clc.uc.edu/courses/Bio104/dna.htm Frederick Griffith’s famous experiment was conducted in 1928. In his experiment‚
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at least 100 words: 1. Describe the structure of DNA. ➢ DNA is a nucleic acid‚ which consist of long chains (polymers) of chemical units (monomers) called nucleotide. A molecule of DNA contains two polynucleotides‚ each a chain of nucleotides. Each nucleotide consists of a nitrogenous base‚ a sugar‚ and a phosphate group. Each DNA strand serves as a mold‚ or template‚ to guide reproduction of the other strand. There are four different types of nucleotides found in DNA‚ differing only in the nitrogenous
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In the book “The DNA of Relationships” Dr. Gary Smalley gives many examples of how to handle rough patches in a relationship. He gives advice on things you need to work on in yourself before confronting your partner‚ or friend. He also lists many fears and our reactions to these fears. It is a good book to read whether you are in a relationship or not. Dr. Smalley discussed fears in chapter two. There were several fears that stuck out to me while I read through the list. I recognized these fears
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Associate Program Material DNA Worksheet Answer the following in at least 100 words: 1. Describe the structure of DNA. DNA stands for Deoxyribonucleic acid and looks like a spiral. The spiral is also known as a double helix. The strands are made up of our genetic information‚ composed of genes and chromosomes. There are four bases divided among purines and pyrimidines. On the purines there are Adenine (A) and Guanine (G). On the pyrimidines there are Cytosine (C) and Thymine (T). The
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DNA Extraction Lab Problem Statement: Do you think you have ever eaten DNA? Background Information: DNA is too small to see under a regular microscope‚ so how can it be studied? DNA is a large molecule found in all living things; therefore it is possible to extract it from cells or tissues. All we need to do is disrupt the cell’s plasma membrane and nuclear envelope‚ make the DNA clump together and - voila! - DNA extraction is possible. DNA extractions from onion‚ bananas‚ liver‚ or wheat
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GENETICS (DNA - CHROMOSOMES) 7/16/2013 DNA – Chromosomes - Genes DNA •DNA: the chemical inside the nucleus of a cell that carries the genetic instructions for making living organisms. •The material inside the nucleus of cells that carries genetic information. • The scientific name for DNA is deoxyribonucleic acid. D.J.A 1 7/16/2013 http://www.ncbi.nlm.nih.gov/ Chromosomes • A chromosome is one of the threadlike "packages" of genes and other DNA in the nucleus of a cell. •
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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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DNA Extraction from Fruit 1. What was the purpose of adding liquid soap and salt in step #1 and how does NaCl contribute to maximum DNA extraction. The purpose of using soap was to destroy the membranes inside a kiwi cell. Soap helped with that because it dissolves the membranes easily. Salt or NaCl was used to remove proteins and carbohydrates. NaCl caused the proteins and carbohydrates to precipitate. 2. Why was it necessary to “mush” the kiwi by hand? If the step was omitted‚ what
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DNA Extraction of a Musa acuminata Biology Lab Report \Analyze and Interpret A number of steps are required to isolate DNA from cellular contents. Describe what happens at each step‚ and why it acts to separate the parts of the cell. /6 There are three specific steps required to isolate DNA from its cellular contents. The steps used to remove and expose DNA from its cell are: breaking down the food type you are using by crushing it‚ for example a banana or strawberries‚ exposing the substance
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DNA synthesis inhibitors Nucleic acid inhibitors are chemicals which inhibit the production of nucleic acids including both DNA and RNA. DNA and RNA inhibitors inhibit enzyme action in DNA replication in the same way as the topoisomerase inhibitors we discussed earlier. Topoisomerase inhibitors (1) (10) are chemicals which interfere with the enzymes that allow DNA strands to separate and to re-join‚ a process that is required for the division of bacteria and without which DNA cannot effectively
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