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 base. DNA is contained in
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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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Should voting in the U.s be mandatory? In this article‚ the author shows the opinions of two professors. Lisa Hills‚ from Australia‚ explains the benefits of mandatory voting and how it could change the U.S and how it could help us in many ways. Mandatory voting would give all Americans say in politics. The government wouldn’t just pay attention to certain people. The people the vote would get more attention because of their contribution to politics. This could have bad effects on the people
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number of studies have been performed to address the impact of mandatory rotation of audit firms to ensure the appropriate level of independence ’ of auditors. Majority of studies conclude that the detrimental effects of firm rotation on the quality of the audit work by far outweigh its positive effects as a safeguard against various independence and quality threats. Frequent changes of audit firms‚ whether resulting from mandatory rotation or otherwise‚ introduce threats to independence and operational
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Mandatory school vaccination is one of the most intensely debated issues in society. All 50 states and the District of Columbia have vaccination requirements for children attending public elementary and secondary schools. Over the years the debate has moved from whether states have the right to mandate school vaccinations‚ to should vaccinations be required for school attendance. I believe immunizations should be mandatory for students because vaccinations protect public health‚ are cost-effective
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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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Arguments in Favour of Mandatory Audit Rotation: As an attempt to strengthen the audit independence and the audit quality‚ mandatory audit rotation is to be considered as a very good proposal to safeguard the audit independence. It is‚ however‚ limited number of years above that the audit firm or the engagement partner (For instance‚ the U.K. approach is to change only the engagement partner. While in the U.S. approach it is mandatory to change the whole audit firm) can no longer be or continue
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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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process by which DNA turns into polypeptides is a complicated and long. Two main steps in changing the DNA into a polypeptide are transcription and translation‚ with transcription coming first. The process first starts in the nucleus of the cell. The DNA begins to unfold with the help of a helicase. During the transcription phase of the change‚ strands of DNA begin to unwind and the complementary mRNA is made or transcribed. The way they do this is by using the common pairs of DNA triplet bases (A-T
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Do you think recycling should be mandatory? Recycling should be mandatory because we as a planet have a waste problem. We are the only ones that can fix it‚ and we should be bound by a law to do so. Education‚ Logistics and Marketing Strategies Can Lower Recycling Costs. They have also cut costs by scaling back the frequency of curbside pickups and automating sorting and processing. (www.opala.org/solid_waste/archive/Mandatory_Recycling_) Opposing Argument- By cutting costs there are people
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