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AP Biology Chapter 20 Flashcards

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5726254393Recombinant DNADNA molecules formed when segments of DNA from 2 different sources (often different species) are combined in vitro (in a test tube)0
5726254394BiotechnologyManipulation of organisms or their components to make useful products1
5726254395Genetic EngineeringDirect manipulation of genes for practical purposes2
5726254396PlasmidSmall circular DNA molecules that replicate separately from the bacterial chromosome3
5726254397Gene cloningProduction of multiple copies of a single gene4
5726254398Restriction EnzymesAlso called restriction endonucleases Protect bacterial cell by cutting up foreign DNA5
5726254399Restriction SiteA particular short DNA sequence that restriction enzymes recognize and cut at precise points6
5726254400Restriction fragmentsA set of DNA pieces that result from restriction enzyme activity7
5726254401Sticky endAt least one end of a DNA fragment is longer than another8
5726254402DNA LigaseEnzymes that catalyze the formation of covalent bonds that close up the sugar-phosphate backbone9
5726254403Cloning vectorA DNA molecule that can carry foreign DNA into a host cell and replicate there (the original plasmid)10
5726254404Genomic LibraryA complete set of plasmid-containing cell clones, each carrying copies of a particular segment from the initial genome11
5726254405Bacterial Artificial Chromosome (BAC)Large plasmids, trimmed down so that they just contain the genes necessary to ensure replication Very large insert size12
5726254406Complementary DNA (cDNA)Double stranded DNA resulting from reverse transcriptase acting on mRNA13
5726254407Nucleic Acid HybridizationA technique in which single-stranded nucleic acids (DNA or RNA) are allowed to interact so that complexes called hybrids are formed by molecules with similar, complementary sequences.14
5726254408Nucleic Acid ProbeSingle stranded RNA or DNA molecules used in nucleic acid hybridization15
5726254409Expression VectorA cloning vector that contains a highly active bacterial promoter just upstream of a restriction site where the eukaryotic gene cab be inserted in the correct reading frame Allows the synth. of many eukaryotic proteins in bacterial cells16
5726254410Problem with cloned eukaryotic genes in bacteriaEukaryotic genes have many introns (noncoding areas) Introns make the genes very long and unwieldy to prevent correct expression in bacteria (which do not have RNA-splicing machinery)17
5726254411ElectroporationA brief electrical pulse applied to a solution containing cells to create temporary holes in their plasma membranes (to insert DNA)18
5726254412Polymerase Chain ReactionA quick, selective technique used to quickly amplify a specific target DNA segment Heated to denature DNA Cooled to allow annealing (hydrogen bonding) of short, single stranded DNA primers complementary to sequences on opposite strands at each of the target sequence A heat-stable DNA polymerase extends primers in 5' to 3' direction19
5726254413Gel ElectrophoresisA technique that uses a polymer (agarose) gel to separate nucleic acids or proteins on the basis of size, electrical charge, or other physical properties DNA starts at black cathode (negative end) and travels to red anode (positive end)20
5726254414Restriction Fragment Length PolymorphismA type of sequence seen after electrophoresis21
5726254415Southern BlottingCombines gel electrophoresis and nucleic acid hybridization to allow detection of bands that include parts of the Beta-globin gene22
5726254416Northern Blotting? Uses mRNA instead of DNA23
5726254417Reverse transcriptase polymerase chain reactionQuicker and more sensitive than Northern blotting24
5726254418In Situ hybridizationTrack down location of specific mRNAs using labeled probles in place (in situ) in the intact irganism25
5726254419DNA Microarray AssaysTiny amounts of a large number of single-stranded DNA fragment representing different genes fixed to a glass slide in a tightly spaced grid (array)26
5726254420In Vitro MutagenesisSpecific mutations are introduced into a cloned gene, and then the mutated gene is returned to a cell Mutated gene disables the normal cellular copes of the same gene to alter or destroy the function of the gene product27
5726254421Genome-Wide association studiesAnalysis of the genomes of large numbers of people with a certain phenotypic condition/disease28
5726254422Somg;e Mic;eptode {p;y,pr[jos,A single base pair site where variation is found in at least 1% of the population29
5726254423TotipotentA mature cell of an organism that can dedifferentiate and has the potential to give rise to all the specialized cell types of the organism30
5726254424Nuclear TransplantationRemove nucleus of an unfertilized or fertilized egg and replace it with the nucleus of a differentiated cell Older the donated nucleus, the lower the percentage of normally developing organisms31
5726254425Stem CellA relatively unspecialized cell that can both reproduce itself indefinitely and (under appropriate conditions) differentiate into specialized cells of one or more types Embryonic Stem cells - Many cell types (pluripotent) Adult Stem (marrow) cells - Limited32
5726254426Gene therapyIntroducing genes into an afflicted individual for therapeutic purposes33
5726254427TransgenicInvolving a gene from an animal of one genotype introduced into the genome of another individual, often a different species34
5726254428Genetic ProfileAn individual's unique set of genetic markers35
5726254429Short Tandem RepeatsVariations in length of genetic markers36
5726254430Ti PlasmidNew plasmid vectors used to introduce genes into plant cells37
5726254431Genetically Modified OrganismsAn organism that has artificially acquired one or more genes from another species (or another variety of the same species)38

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