BioLab3 DNA Structure and Function Lab Report Student Name: I. DNA Structure Define the following terms: Purines A colorless crystalline compound with basic properties‚ forming uric acid on oxidation. Pyrimidines A colorless crystalline compound with basic properties; a substituted derivative of this‚ especially the bases thymine and cytosine present in DNA. Nucleotides A compound consisting of a nucleoside linked to
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DNA extraction and purification is an essential tool in understanding the biological basis and significance of a eukaryotic cell. Its role is pivotal to numerous scientific applications ranging from basic science research to applied research. Hence‚ DNA is found in all living organisms. Fragaria x ananassa‚ also known as a strawberry has been widely used as one of the many biological models in studying DNA structures due to its accessibility. Strawberries are octoploid which contain large genomes
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Radioisotopic labels would be used in experiments to identify semi-conservative replication in prokaryotes. Because we anticipated that a labeled DNA would have different density with unlabeled‚ which means‚ by analyzing the different density of DNAs‚ we can determine which of DNA is labeled‚ half-labeled or unlabeled. To this end‚ I will use c13 label the bacteria and abruptly change carbon source with C12. Then I will collect four samples in different time and analyze the results from centrifugal
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Forensic DNA Evidence DNA has become one of the most accurate tools used in law enforcement in determining guilt or innocence. DNA is different in all people it is our “genetic blueprint.” DNA is so significant to law enforcement because DNA left at a crime scene can be collected and tested to see if there is a match. It is unique because it ensures accuracy and fairness. The initial use of DNA began in Britain in 1986; the FBI used it for the first time in the United States two years
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Write a 350 to 700 word summary describing if the collection of DNA without consent unreasonably intrudes on an arrestees’ expectation of privacy. How long can police keep your DNA on file after an arrest or conviction? Can law enforcement use a person’s DNA to match against other crimes unrelated to the one they initially obtained it for? Provide examples and or reasons. The collection of DNA without consent can unreasonably be seen as intruding on someone who has been not been arrested however
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DNA DNA‚ or Deoxyribonucleic Acid‚ is described‚ in Encarta Encyclopedia as a genetic material of all cellular organisms and most viruses. DNA carries the information needed to direct protein synthesis and replication. Protein synthesis is the production of the proteins needed by the cell or virus for its activities and development. Replication is the process by which DNA copies itself for each descendant cell or virus‚ passing on the information needed for protein synthesis. In most cellular
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NTRODUCTION : Ethymology : "myo" means muscle and "pathos" means disease. The term "mitochondrial disease" was introduced in 1962 by a group of scientifics‚ including the endocrinologist Rolf Luft‚ the biochemist Lars Ernster‚ and the morphologist Björn Afzelius. Their investigation were based on a woman with a severe hypermetabolism. They worked on three points : abnormal mitochondria in muscle‚ a great correlation between biochemical abnormalities and clinical features (uncontrolled muscle metabolism)
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A positive feedback loop occurs when the production of a reaction leads to an increase in that reaction. If a system is in homeostasis‚ a positive feedback loop moves a system further away from the target of equilibrium. It does this by amplifying the effects of a product or event and occurs when something needs to happen quickly. An example of this type of feedback loop in the endocrine system is occurs during childbirth. When labor begins. The baby’s head is pushed downwards‚ resulting in an increased
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In ‘Ethical Considerations of “Three-Parent” Babies’‚ J.D. Loike and N. Reame of Columbia University‚ College of Physicians and Surgeons discuss mitochondrial replacement therapy. Mitochondrial replacement therapy‚ or three-parent IVF‚ is where a nucleus from an egg in a woman with a mitochondrial disease is injected into an egg from a healthy woman that’s nucleus has been removed. This combination egg is then placed into a healthy uterus via in vitro fertilization. Ethical concerns arise with
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What is an infinite loop? Write the code for an infinite loop. An infinite loop is a sequence of instructions in a computer program which loops endlessly. Example of an infinite loop: Set k = 1 While k < = 5 Display k End While 7. A FOR loop looks like what other loop in a flowchart? A For loop looks like a count-controlled loop. 8. Why is it critical that accumulator variables are properly initialized? An accumulator is used to keep a running total of numbers. In a loop‚ a value is usually
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