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BIOL 1011 (4)
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Louisiana State University
Biological Sciences
BIOL 1011

Chapters 8 Questions1Transformation is the transfer of DNA from a donor to a recipient cellAby a bacteriophageBas naked DNA in solution Cby cell tocell contact Dby sexual reproductionEnone of the above2 Mutations arising from chance events in the environment are known asAbackground mutationsBspontaneous mutationsCenvironmental mutationsDinduced mutations 3Ultraviolet light may induce a mutation by Adissolving the cell membrane of a bacteriumBbreaking down ATP moleculesCrestricting transcriptionDbinding together adjacent thymine molecules on the DNA molecule 4The deletion or insertion of extra nucleotides during chromosomal replication can lead to Athe loss of competence by a bacteriumBan overlapping gene situationCa mutation due to a shift in the reading frameDthe formation of sticky ends needed for genetic engineering experiments5Nitrous acid can cause a mutation by Aconverting DNAs adenine to hypoxanthineBeliminating transposons from a bacteriumCinducing transduction to occurDdeaminating proteins involved in DNA replicationEpoisoning DNA polymerase 6The Ames test is most useful for Adetermining the presence of an F cellBnoting whether a cell is competent for transformationClearning whether a chemical can induce a bacterial mutationDtesting genes Edeveloping a model for genetic engineering in a bacterium7Which of the following does NOT apply to plasmidsAThey are essential for the growth of the cellBThey are composed of DNACThey multiply independently of the chromosomeDThey may pass from cell to cell in recombinationEThe fertility factor is a plasmid 8The work of Avery MacLeod and McCarty is significant because it Aled to the discovery of restriction enzymesBresulted in the discovery of plasmidsCcalled attention to the involvement of DNA in heredityDshowed that mutations could occur spontaneously 9During conjugation a recipient cell might be converted to a donor cell by the Aloss of its capsuleBacquisition of the F factorCproduction of plasmidsDinduction of a bacteriophage prophageEloss of its sex pilus 10Transposons are movable genetic elements thatAcarry information for protein synthesisBcan move from one position on chromosome to another positionCare composed solely of proteinDonly A and BEall of the above 11The rolling circle mechanism of DNA replication takes placeA during lysogenyBas transposons move aboutCduring bacterial conjugationDduring transformationEduring normal chromosome replication 12The competence of a bacterium refers to itsAability to support viral replicationBability to take up DNA from the environmentCfrequency of conjugation with other competent bacteriaDfrequency of transposon and insertion sequence movements13You have carried out a conjugation and discovered that the recipient cells have almost all become donors but that no chromosomal genes have been transferredThe male cell in the original mating was anAF cellBHfr cellCF cell14Avery et al demonstrated that pneumonia cocci could take up DNA directly from the medium surrounding themThis is an example of AmutationBconjugation
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