Streptococcal proteins display molecular mimicry recognized by the immune system‚ especially bacterial M-proteins and human cardiac antigens such as myosin and valvular endothelium. Antimyosin antibody recognizes laminin‚ an extracellular matrix alpha-helix coiled protein‚ which is part of the valve basement membrane structure. The valves most affected by rheumatic fever‚ in order‚ are the mitral‚ aortic‚ tricuspid‚ and pulmonary valves. In most cases‚ the mitral valve is involved with 1 or more of the
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Williamson in his science fiction novel Dragon’s Island‚ published in 1951‚one year before DNA’s role in heredity was confirmed by Alfred Hershey and Martha Chase‚ and two years before James Watson and Francis Crick showed that the DNA molecule has a double-helix structure‚ DNA stands for (deoxyribonucleic acid). For many years‚ there has been a controversy surrounding the morality of genetic modifying organisms. Some it’s unethical since it may lead to side effects such as mutation‚ others say it’s totally
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Extraction of DNA from Calf or Hog Thymus/Isolation of Yeast RNA I. Abstract Nucleic acids may be divided into two groups RNA and DNA. DNA contains almost all the genetic information while RNA serves as the bridge between the DNA and proteins. Study of both DNA and RNA initially involves proper extraction/isolation. The storehouse of eukaryotic DNA is the nucleus (and in the mitochondria)‚ so experimentally‚ DNA is extracted from tissues that have a high nuclear to cytoplasmic mass ratio‚ such
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According to James Morris Blaut‚ "Eurocentrism is quite simply the colonizer’s model of the world.”If I were to meet a genie‚ and was offered one wish to solve any problem‚ it would be to stop Eurocentric standards be the definition of beauty in the media and fashion industries‚ especially when it comes to hair.The media often portrays the Eurocentric standards of beauty‚ by presenting women of color with lighter skin‚ thin body‚ and sleek straight hair.Therefore‚ contradicting African American beauty;
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About James Dewey Watson and his discovery The definition of the word honor is high respect; esteem. My definition of the word honor is having respect for someone who has earned it and has done right. James Watson has had many accomplishments such as being one of the co discoverers of the structure of DNA. He has also received the Nobel prize in physiology or medicine‚ Copley medal‚ presidential medal of freedom‚ gairdner foundation international award‚lomonosov gold medal‚ EMBO membership‚
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When you are riding a roller coaster‚ have you ever wondered what keeps you in your seat when you go through a loop‚ corkscrew or helix? Or are you too excited to even notice? There are literally only two types of roller coasters. One type is a steel roller coaster. Another type is a wooden roller coaster. Even though they are made of different materials their needs to operate are the same. Every roller coaster needs a launch‚ physics and a good braking system. So to fully understand how roller coasters
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Basic Problem: Jelly is made from protein‚ gelatin‚ this is dissolved in hot water and as it cools‚ it sets. For a childrens party it was decided to make some fruit jellies‚ these were made by putting sliced pineapple into the jelly before it set‚ the following observations were made: oThe jelly set normally when tinned pineapple was added. oWhen fresh‚ unripe pineapple was used the jelly set but was not as firm. oWhen fresh‚ ripe pineapple was used‚ the jelly did not set at all But why? The
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Hutchinson-Gilford Progeria Syndrome by Jack Be Nimble Hutchinson-Gilford Progeria Syndrome (HGPS) is a rare‚ fatal genetic condition that is characterized by premature aging in children. Its name is derived from the Greek and means “prematurely old.” There are different forms of Progeria‚ but we will be looking at the classic form that was named after the doctors who first discovered it‚ Dr. Jonathon Hutchinson in 1886 and Dr. Hastings Gilford in 1897. Progeria is a very rare disease and affects
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I. How are gametes different from somatic cells? 1. Somatic Cells A. Body Cells i. Eyes‚ Liver‚ Spleen 2. Gametes A. Sex Cells i. Sperm‚ Eggs a. Sperm- Male Sex Cells b. Eggs- Female Sex Cells II. What do the terms haploid and diploid mean? 1. Haploid A. A cell only has one copy of each chromosome i. Somatic Cells 2. Diploid A. A cell has two copies of each chromosome i. Gametes III. What are homologous chromosomes? 1. Two chromosomes--one inherited
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thymine. 2. The process of acquiring a gene from another organism is called transformation. 3. The Hershey-Chase experiment showed that the virus protein is responsible for directing the production of new viruses. 4. The two sides of the double helix structure of DNA are held together by hydrogen bonds. 5. DNA replication is called semiconservative because half of each of the two new strands of DNA is “old” DNA from the original DNA molecule and half is the “new” DNA. Unit 1-2: Chromatin
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