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Chapter 17 - cloudfront.net
Chapter 17 - cloudfront.net

... 21. Describe the process of translation including initiation, elongation, and termination and explain what enzymes, protein factors, and energy sources are needed for each stage. ...
Powerpoint file - revised
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... Therefore, transcriptional initiation is usually the major control point. Most prokaryotic genes are regulated in units called operons (Jacob and Monod, 1960) Operon: a coordinated unit of gene expression consisting of one or more related genes and the operator and promoter sequences that regulate t ...
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Chapter 8 DNA and RNA
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... the promoter and ends at the terminator within template strand. Proteins first interact with DNA sequences in the initiation process. RNA polymerase binds to the promoter. RNA is made in the 5’ – 3’ direction from a 3’-5’ DNA template. In eukaryotes only mRNA is processed. Intons are cut out and a c ...
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Chapter 7: Gene Expression: The Flow of Genetic Information from
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... together the remaining exons. Alternative splicing makes it possible to produce different mRNAs from the same primary transcript. Translation is the stage of gene expression when the cell synthesizes proteins according to instructions in the mRNA. a. tRNAs carry amino acids to the translation machin ...
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Regulation of Gene Expression - mvhs
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Chapter 2. Nucleic Acids
Chapter 2. Nucleic Acids

... expressing and transmitting genetic information.  Growth, reproduction and hereditary characteristics depend on DNA.  DNA contains the information that directs the development of an organism.  DNA is able to replicate each time a cell divides and also have the information that is to be selectivel ...
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... Mutations in the Body Cells • If a mutation occurs in a nonreproductive cell of the body such as in the skin, muscle or bone, the mutation would not be passed on to the offspring. • The damage of the gene may impair the function of the cell. • If the mutation affects the cells ability to control ce ...
Gene Mutations
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... Splice Site Mutations • Before mRNA leaves the nucleus, introns (noncoding regions) are removed and exons (coding regions) are joined together. This is called RNA splicing. This process is controlled by the base sequences of the genetic code. Mutations can occur which cause mistakes in the splicing ...
Gene Expression
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... small fragments of DNA. An array of fine needles is controlled by a robotic arm that is dipped into wells containing the DNA probes. Each needle then deposits a probe at the desired location on the surface. The probes are fixed to the surface. Then the chip is ready to be washed in a solution contai ...
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... Biochemical analysis of the lac operon region (Fig. 10-8 and 10-9) identifies binding sites for three regulatory protein in a short span of DNA. These include RNA polymerase, lac repressor and another protein, CAP=catabolite activator protein which also functions in lac regulation along with cAMP. ...
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Gene expression



Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins, but in non-protein coding genes such as transfer RNA (tRNA) or small nuclear RNA (snRNA) genes, the product is a functional RNA.The process of gene expression is used by all known life - eukaryotes (including multicellular organisms), prokaryotes (bacteria and archaea), and utilized by viruses - to generate the macromolecular machinery for life.Several steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-translational modification of a protein. Gene regulation gives the cell control over structure and function, and is the basis for cellular differentiation, morphogenesis and the versatility and adaptability of any organism. Gene regulation may also serve as a substrate for evolutionary change, since control of the timing, location, and amount of gene expression can have a profound effect on the functions (actions) of the gene in a cell or in a multicellular organism.In genetics, gene expression is the most fundamental level at which the genotype gives rise to the phenotype, i.e. observable trait. The genetic code stored in DNA is ""interpreted"" by gene expression, and the properties of the expression give rise to the organism's phenotype. Such phenotypes are often expressed by the synthesis of proteins that control the organism's shape, or that act as enzymes catalysing specific metabolic pathways characterising the organism.
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