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Chapter 18 Vocab Flashcards

campbell reece 7th edition

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51879477CapsidThe protein "head" of a virus where its genetic information is held.0
51879478Viral envelope9. A membrane surrounding the capsid which can contain host cell phospholipids or membrane proteins.1
51879479BacteriophagesViruses that infect bacteria. These have the most complex capsids.2
51879480Host rangeThe types of cells which a virus can infect3
51879481Lytic cyclePhage reproduction that kills the host cell.4
51879482Virulent phagePhage which can only reproduce through lytic cycle5
51879483restriction enzymeEnzymes which cut up foreign DNA6
51879484Lysogenic cycleThe method by which a virus reproduces without destroying the host cell.7
51879485Temperate phagesA virus capable of lytic or lysogenic cycles8
51879486ProphageA virus which can insert its DNA into a host cell's genome without replacing it9
51879487RetrovirusesRNA animal viruses which have complicated reproductive cycles.10
51879488Reverse transcriptaseEnzyme which transcribes RNA templates into DNA11
51879489HIVRetrovirus that causes AIDs12
51879490AIDSAcquired immunodeficiency syndrome13
51879491ProvirusThe integrated viral DNA from a prophage14
51879492VaccineHarmless derivatives of pathogenic microbes that can "teach" the immune system to resist actual pathogens.15
51879493PrionInfectious proteins which can cause brain diseases in animals16
51879494NucleoidA dense region of DNA that is not bound by a nucleus17
51879495TransformationAlteration of a bacteria cell's genetic information by DNA from the environment18
51879496TransductionProcess by which phages carry bacteria genes from one host to another19
51879497ConjugationThe transfer of DNA from one bacterial cell to another while they are temporarily joined20
51879498F factorPiece of DNA which enables conjugation21
51879499PlasmidSmall circular DNA molecule separate from bacterial chromosome22
51879500EpisomeGenetic element that can replicate as part of the chromosome or independently23
51879501F plasmidPlasmid form of the F factor24
51879502R plasmidsPlasmids which confer the ability to resist certain antibiotics25
51879503Transposable elementsPieces of DNA which can move in the genome26
51879504Insertion sequencesSingle gene transposable elements which codes for transposase that catalyzes movement of insertion sequence from one site to another in the genome27
51879505TransposonsTransposable elements longer than insertion sequences.28
51879506OperatorA switch in DNA which can turn on or off a segment of related genes.29
51879507RepressorBinds to an operator and blocks attachment of RNA polymerase30
51879508Regulatory geneGene which codes for a repressor.31
51879509CorepressorSmall molecule that turns operons off by working with a repressor protein32
51879510InducerMolecule which inactivates a repressor33
51879511cyclic AMPAccumulates when glucose is scarce and helps to regulate the production of lactose-utilizing enzymes34
51879512ActivatorCauses an inactive protein to become active35

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