Transport of vesicles facilitated by kinesin and the effects of mutations in nerve transmission in Caenorhabditis elegans Introduction A nerve cell is made up of three main structures: the soma‚ the axon and the synapse. When a nerve cell receives a signal‚ a protein called kinesin travels anterograde along the axon and guides the synaptic vesicles until it reaches the synapse. This triggers the release of the neurotransmitters stored within the vesicles. Once released‚ the neurotransmitters then
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organs always accompany aging‚ resulting in age-related diseases. Current research focuses on treating aging‚ to bring about longevity and healthy lifestyles. The nematode Caenorhabditis elegans is used as a model organism for genetic studies of aging and longevity. Caenorhabditis elegans is a free-living bacteriovorus
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particularly the brain cells. Over exposure to alcohol may change the overall gene expression‚ thus leading to alcohol dependency. This essay will examine the concept of chromatin reorganization on the effect of alcohol on a type of nematode known as Caenorhabditis elegans. Cells are the basic units of life. The nucleus is the control center of the cell
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of many protein-coding genes. In an investigation inspiring for both its perseverance and its scientific insight‚ Victor Ambros and colleagues‚ Rosalind Lee and Rhonda Feinbaum‚ discovered that lin-4‚ a gene known to control the timing of C. elegans larval development‚ does not code for a protein but instead produces a pair of small RNAs (Lee et al.‚ 1993). One RNA is approximately 22 nt in length‚ and the other is approximately 61 nt; the longer one was predicted to fold into a stem loop
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interference by double-stranded RNA in Caenorhabditis elegans. McMahon‚ L.‚ Muriel‚ J.M.‚ Roberts‚ B.‚ Quinn‚ M.‚ and Johnstone‚ I.L. (2003). Two sets of interacting collagens form functionally distinct substructures within a Caenorhabditis elegans extracellular matrix. Mol Biol Cell 14‚ 1366-1378. Timmons‚ L.‚ Court‚ D.L.‚ and Fire‚ A. (2001). Ingestion of bacterially expressed dsRNAs can produce specific and potent genetic interference in Caenorhabditis elegans
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Methylation of cytosines within DNA is found in most eukaryotes (plants‚ animals and fungi) (Klose and Bird‚ 2006)‚ but not in Caenorhabditis elegans and Saccharomyces cerevisae (Feng et al.‚ 2010). CpG islands are DNA sequences of 200 – 3000 bp characterized by higher CG content (at least 50 %) (Illingworth and Bird‚ 2009). Almost half of CpG islands are associated with transcription
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5 essential characteristics of all living cells: 1. Bounded by a lipid rich plasma membrane 2. Contain nucleic acid that encodes at least one complete copy of a genome a. Originally RNA… these days‚ exclusively DNA b. All cells replicate DNA by template directed polymerization into an intermediate form RNA 3. Capable of regulated metabolic activity a. Through macromolecular catalysis 4. Capable of protein synthesis a. The machinery of protein synthesis is conserved among all cells (MOSTLY RNA) b
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Chapter 32/33: Invertebrates Name _______________________ Period ___________ Date ____________________ NONCOELOMATE INVERTEBRATES (CH 32) Sponges are basal animals that lack true tissues 1. Sponges are in the phylum Porifera. This group is now known to be polyphyletic‚ and all sponges belong to either phylum Calcarea or phylum Silicea. They are the simplest animals and lack true tissues. Label the following: pores‚ spongocoel‚ epidermis‚ amoebocytes‚ choanocyte‚ flagellum‚ spicules
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The Effect of Srb-16 and F35B1.3 RNAi Gene Treatment on Chemosensation in Caenorhabditis elegans through Observation of Chemotaxis. Abstract: The study of sensory systems in humans is a vital area of study to further pursue our knowledge of the mechanisms occurring in the nervous systems. However due to the complications surrounding human testing‚ model organisms such as C. elegans worms can be utilized as a comparison to create paradigms relevant to human sensory systems as the genetic basis
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Unicellular organism From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search "Single-celled" redirects here. For prison cell assignment‚ see Single-celling. Valonia ventricosa is among the largest unicellular species. A unicellular organism‚ also known as a single-celled organism‚ is an organism that consists of only one cell‚ unlike a multicellular organism that consists of multiple cells. Historically the simple single celled organisms have sometimes been referred to as monads
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