Long stands of double helical DNA can fit into the nucleus of a single cell because DNA is specially packaged through a series of compaction events to fit easily within cell nuclei. Even though the length of DNA per cell is about 100‚000 times as long as the cell itself‚ it only takes up only about 10 percent of the cell’s volume. The DNA molecule‚ in order to condense‚ wraps itself around groups of histone proteins‚ and then the chromatin folds back on it‚ nucelosomes pack together to create a compact
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August 28‚ 2013 DNA Extraction on Onion (Allium cepa) and Human Cheek Cell Arriza‚ Rolland Merch Buscato‚ Carl G. Butil‚ Conrad G. Leonida‚ Renee Theresa ABSTRACT This activity observes the DNA present in onion (Allium cepa) and human cheek cells by extracting it with the addition of lysis buffer and chilled ethanol. The lysis buffer is prepared from squeezed onion mixed with salt and Pantene Pro-V Shampoo. The buffer degrades the protein enveloping the DNA found in onion and cheek cells
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Erikson and the Wild Strawberries In the Life Cycle Completed by Erik H. Erikson‚ Erikson talks about the stages in life those stages range from infancy to elderly age. The stages are basic trust vs. basic mistrust‚ autonomy vs. shame and doubt‚ initiative vs. guilt‚ industry vs. inferiority‚ identity vs. identity confusion‚ intimacy vs. isolation‚ generatively vs. stagnation‚ and finally integrity vs. despair. In Wild Strawberries the character Isak Borg goes through all the stages that Erikson
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Experiment 4: Isolation of Essential Oils from Eugenol Background: Anyone who has walked through a forest or who enjoys the variety of fragrances that flowers have to offer knows that many plants and trees have their own distinctively pleasant odors. These odors are due to the volatile essential oils‚ many of which have been prized commodities since ancient times. If a list of commercially important essential oils was compiled the list would exceed 200 essential oils. Thyme‚ garlic‚ peppermint
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The article “UPDATE: ‘The Onion’ Has Finally Confirmed There Were No Survivors In The Challenger Disaster” by I. Newton talks about ‘The Onion’ article and their anyslition on the event. This is for the Americans and families who lost someone in the disaster to answer their questions on if anyone could survive the Challenger disaster. When things back to that event or watching a video that was recorded of the event it is very sad and terrifying that something like that happened and with this article
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ISOLATION OF INDIVIDUAL BACTERIAL COLONIES ON SOLID MEDIA Robert Koch developed a method for isolating pure cultures on solid media in 1883. To this end he added agar (a solidifying agent) to liquid nutrient broth; the nutrient broth supports the growth of a wide variety of microorganisms while the agar provides a solid substrate on which bacteria can be mechanically diluted and therefore isolated as independent colonies representing different bacterial species. The isolation of independent bacterial
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The Strawberry Festival has now become an annual tradition at USD where the dining services provide free food for the students and faculty. Throughout the festival I surprised to see the amount of students that attended because they did not advertise as much as I expected them to do so I thought the students were not well informed. However‚ in the Student Life Pavilion (SLP) at tables they did have a small sign that advertised it as well they sent out an email to inform us however in the SLP student
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To the informed reader‚ it is known that the Onion is a news website in which satirical articles are written about local and national events‚ however‚ this satire can sometimes be missed due to the nature of the article and its presentation of information. Due to how the article is written in the fashion of an actual news article it creates the appearance of actual news and could be seen as such if the satire is missed. With the articles use of quotations and the appearance of fact it gives the tone
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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 by ultraviolet absorption. According to the hypothesis above‚ I
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Experiment 11b: Isolation of Caffeine from a Tea Bag October 12‚2012 Purpose: The objective of this experiment is to extract caffeine from tea bags using the method of extraction. After the caffeine is extracted it is then compared to the nutritional facts amount per serving on the tea bags box. Supplies: Glassware: 1. 50.0 m L graduated cylinder 2. 150.0 mL beaker 3. 2-glass stirring rod 4. 6-test tubes 5. 2-glass pipettes 6. 2-50.0 mL Erlenmeyer flasks 7. glass funnel Hardware:
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