it is ingested‚ it causes a deadly reaction in the human body. The major toxin mechanism is the inhibition of RNA polymerase II in DNA reproduction. The reason this becomes deadly is that this is a vital enzyme in the synthesis of the messenger RNA and without it‚ protein synthesis cannot happen and new cell production ceases. (Karlson-Stiber C‚ Persson‚ H (2003). When the human body is no longer able to recreate the template for new cell reproduction‚ the old cells die and new ones can no longer
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MINIREVIEW Folate Receptor-Mediated Drug Targeting: From Therapeutics to Diagnostics ANDREW R. HILGENBRINK‚ PHILIP S. LOW Department of Chemistry‚ Purdue University‚ West Lafayette‚ Indiana 47907 Received 25 May 2005; accepted 27 June 2005 Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jps.20457 ABSTRACT: Folate targeted drug delivery has emerged as an alternative therapy for the treatment and imaging of many cancers and inflammatory diseases. Due to its
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Helical polymer of actin protein; two protofilaments. Smallest cytoskeleton diameter (3-6nm) structure Thinner‚ shorter‚ more flexible than microtubes. One basic 7subunit‚ globular actin. Structurally polar. Have fast reaction to stimuli. What super structures do they form? 1.Microvilli; structure of microfilaments lining the edge of cell 2.Stress fibers; antiparallel of actin bundles‚ contractile forces‚ wound healing ect. 3.Lamellipodia; sheet lik1.Nucleating proteins; Arp2/3 ce projections
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BIO EXAM 1 BUILDING BLOCKS Aminoacids->Proteins->Enzymes Glucose=Polysaccrides Glyseral=Fat Molecule Neoclotides= DNA & RNA CRITERIA OF LIFE: (5) A. Biology: What is it?: BIOLOGY: is the scientific study of life B. What is life? -- Criteria for life: All living organisms have similar properties -composed of cells made up of macromolecules -growth‚ development & reproduction -heritable information in the form of DNA -sensitivity to stimuli -homeostasis (maintenance of internal environment)
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newborn mammal. You are looking at intestinal epithelial cells that bring important maternal proteins (immunoglobulins) across their apical surfaces by receptor-mediated endocytosis. Your ambition is to be part of a receptor that does that job. A. beginning from the challenge of entering the cell‚ until you have been loaded onto an appropriate tRNA. Amino acids are the building blocks of protein. Within the small intestine is the only site in the digestive tube for absorption of amino acids
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expression is a process that is continuously regulated by the cells nucleus in the regulation of proteins. However‚ this long coding process has to start somewhere. As I said earlier this function is carried out by a cells nucleus where membranes regulate the function of what enter and leaves the cells through a wide range of mechanisms. On the outside of the membrane‚ certain receptors are triggered to certain proteins inside the cells cytoplasm. A certain receptor is made that enters the cells nucleus reacting
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new plant‚ given the right conditions?) Cells loose totipotency‚ as‚ with age‚ different genes are swtiched on/off. When certain genes are switched of‚ they are not translated to produce polypeptides‚ meaning cells only have specific genes‚ the proteins produced serving only to aid their function. Totipotent cells can be used to treat human disorders such as Parkinson’s Disease‚ Alzheimers‚ Osteoarthritis‚ MS... all my growing new tissues from stem cells‚ and growing a culture of the needed
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gas are held together by a. nonpolar covalent bonds b. hydrogen bonds c. ionic bonds d. polar covalent bonds ____ 11. Sucrose is formed from fructose and glucose by a. an electron transfer. b. a cleavage reaction. c. dehydration synthesis. d. a rearrangement. ____ 12. Glycogen‚ cellulose‚ and
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rings of DNA called plasmids‚ all have cell walls e.g. bacteria and blue-green algae • EUCARYOTIC CELLS = unicellular or multi-cellular‚ plant and animal cells‚ have a nucleus‚ have membrane-bound organelles‚ DNA is wound around histone proteins e.g. all plant and animal cells‚ Euglena‚ Paramecium‚ Amoeba‚ yeast |ORGANELLE |WHERE FOUND |STRUCTURE |FUNCTION | |Cell(Plasma)
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Macronutrients Report Macronutrients should be consumed in large amounts to sustain a healthy lifestyle. Macronutrients consist of the following: carbohydrates‚ lipids‚ and protein. In Chapters 4‚ 5‚ and 6 the macronutrients affect our energy in metabolism and help maintain our cells and tissues healthy. The first macronutrient I learned about was carbohydrates. Carbohydrates are made up of carbon‚ hydrogen‚ and oxygen. Carbohydrates are come from plants and provide our bodies with good energy
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