Extracting DNA from Wheat Germ Cells Criteria to be assessed CE Introduction: DNA is the abbreviation for deoxyribonucleic acid. DNA is found in the nucleus of every cell & it stores the information that makes up living organisms. It is a double helix of 4 nucleotides. It contains a code that allows the body to make up proteins. The nucleotides are Cytosine‚ Guanine‚ Adenine and Thymine. (1) Wheat germ comes from wheat seeds. The ’ germ ’ is the embryo‚ which is the part of
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The purpose of the DNA extraction lab was not only to inform students on how DNA is present in humans and all organisms‚ but to also educate them on how DNA can be extracted using common household materials. Also‚ the lab was very efficient as it introduced the students to extracting their own DNA found on their cheek cells as well as letting them take an observation on how DNA appears or how it is formed. Additionally‚ students were instructed through a very clear and simple procedure‚ which guided
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Deoxyribonucleic Acid (DNA) DNA stands for deoxyribonucleic acid‚ it is located in the nuclei of cells which make up the body. DNA is quite often referred to as one of the building blocks of the body.. It is made up of four bases known as: • Adenine • Guanine • Cytosine • Thymine James Watson‚ Francis Crick‚ Maurice Wilkins‚ Rosalind Franklin Crick and Watson‚ together with Maurice Wilkins‚ won the 1962 Nobel Prize in physiology or medicine for their 1953 determination of the structure of
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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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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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have made the use of DNA in forensic science possible. In the past twenty years specifically‚ there have been many extraordinary discoveries in the fields of science that have led to the advancement of procedures in forensics. Before DNA testing‚ the most accurate way of identifying people was to match the blood types of suspects with blood found at the scene of the crime. Considering the lack of variability of this procedure‚ it is no surprise just how important the use of DNA in forensics has become
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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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WHAT IS RECOMBINANT DNA So what is rDNA? It stands for Recombinant DNA. Before we get to the “r” part we need to understand DNA. DNA is the keeper of all the information needed to recreate an organism. All DNA is made up of a base consisting of sugar‚ phosphate and one nitrogen base. There are four nitrogen bases‚ adenine (A)‚ thymine (T)‚ guanine (G)‚ and cytosine (C).The nitrogen bases are found in pairs‚ with A & T and G & C paired together. The sequence of the nitrogen bases can be
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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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Introduction to genetics. For other uses‚ see DNA (disambiguation). The structure of the DNA double helix. The atoms in the structure are colour-coded by element and the detailed structure of two base pairs are shown in the bottom right. The structure of part of a DNA double helix Deoxyribonucleic acid (DNA) is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses. DNA is a nucleic acid; alongside proteins and carbohydrates
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