Kerala PSC Botany Lecturer Assistant Professor Examination 2009 Original Question Paper Part 3 by Easybiologyclass

MCQ012 Savepaper…Savetrees…

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KeralaPSCBotanyLecturer/AssistantProfessorQuestionPaper(Cat.NO.464/2007)

OriginalquestionpaperofKeralaPSCBotanyLecturer/AssistantProfessor(CategoryNo.464/2007) examination conducted by Kerala PSC (Public Service Commission) on20/06/2009 (Q. Code 196/2009) for the appointment of Botany Lecturer/AssistantProfessorinGovernmentCollegesofKeralaundertheDirectorateofCollegiateEducation,Trivandrum,Kerala.MCQ(MultipleChoiceQuestionsformat)

Part–3(Questions51–75)(MCQ012)

51. Buffershastheabilitytoa. ChangeinpHb. ResistchangeinpHc. NoresisttochangeinpHd. Alloftheabove

52. Theamountof lightabsorbedbyamaterial isproportionaltotheconcentrationoftheabsorbingsolutionisreferredas:

a. Beer’slawb. Boger‐Lambertlawc. Poiseuille’slawd. Alloftheabove

53. Theemissionofphosphorescentradiationisslowduetoa. Singletgroundstatetotripletexcitedstatetransitionisforbiddenb. Tripletexcitedstatetosingletgroundstatetransitionisforbiddenc. Singletexcitedstatetotripletexcitedstatetransitionisforbiddend. Both(b)and(c)

54. InGramstaining,safraninactas:a. Primarystainb. Mordantc. Counterstaind. Decoloriser

55.Wheatwasfirstdomesticatedina. Chinab. Peruc. Middleeastd. Mexico

56. Aculturecontainingonlyonekindofmicroorganismiscalled:(questionremoved)www.easybiologyclass.

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a. Cultureb. Pureculturec. Auxeniccultured. Alloftheabove

57. Apopularimprovedvarietyofriceis:a. Pusa240b. PusaBoldc. PusaBasmatid. PusaAgeti

58. TheKmvalueofanenzyme(Michaelisconstant)forasubstrateisdefinedas:a. Halfthesubstrateconcentrationofwhichthereactionrateismaximalb. Thesubstrateconcentrationofwhichthereactionrateishalfmaximalc. Thedissociationconstantoftheenzyme‐productcomplexd. Thedissociationconstantoftheenzyme‐substratecomplex.

59. RNAmoleculesthatexhibitcatalysisisactivityarecalled:a. mRNAb. Ribonucleasesc. Ribozymesd. Ribonucleotides

60. Theco‐existenceofmultipleallelesatalocusiscalled:a. Genepolymorphismb. Nucleotidepolymorphismc. Overlappinggenesd. Geneduplication

61. If you discovered a bacterial cell that had no restriction enzyme, which of thefollowingwouldyouexpecttohappen?

a. ThecellwouldbeunabletoreplicateitsDNAb. Thecellwouldcreateincompleteplasmidsc. Thecellwouldbeeasilyinfectedandlysedbyvirusesd. Thecellwouldbecomeaparasite

62. Thekindoffilterusedinlaminarairflowis:a. Membranefilterb. Seitzfilterc. HEPAd. Alloftheabove

63. Co‐enzymesare__________organiccompounds.a. Non‐proteinb. Proteinwww.easybiologycla

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c. Lipoproteind. Alloftheabove

64. NMRspectroscopyis:a. Absorptionb. Emissionc. Radiationd. Diffraction

65. Inelectrophoresis,ifpHisaboveisoelectricpointaproteinwill:a. Fromzwitterionsb. Migratetoanodec. Precipitated. Notmove

66. Leucinezippermotifisamediatorfora. Membraneattackcomplexb. BindingofregulatoryproteinstoDNAc. CyclicAMPd. Ligandmembranes

67. ThedirectmethodofstudyofBacteriophageisa. Lysogenicconversionb. Serologicaltestingc. Electronmicroscopyd. Plaquestudy

68. Cycasstemshows:a. Porouswoodb. Manoxylicwoodc. Pycnoxylicwoodd. Ringporouswood

69. Whichisthemostdiversemoleculeinthecell?a. Carbohydratesb. Proteinc. Lipidsd. Mineralsalts

70. Lateralrootsinhigherplantsarisefrom:a. Cortexb. Pericyclec. Epidermisd. Endodermis

71. Whatcharacteristicsdoallprotistsincommon?Theyareall:www.easybiologyclass.

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a. Multicellularb. Photosyntheticc. Nonparasiticd. Eukaryotic

72. Whyisthefilamentousbodyoftheslimeandwatermoldsconsideredanexampleofconvergentevolutionwiththehyphaeoftruefungi?

a. Fungiarecloselyrelatedtotheslimeandwatermoldsb. Bodyshapereflectsphylogeneticrelationshipsamongorganismsc. Filamentousshapeisanadaptationforanutritionalmodeasadecomposer

withabsorptivenutritiond. Filamentousbodyshapeisevolutionaryprimitiveforalleukaryotes

73. Adefiningcharacteristicofallopatricspeciationis:a. Theappearanceofnewspeciesinthemidstofexistingonesb. Asexuallyreproducingpopulationsc. Geographicisolationd. Artificialselection

74. Whichofthefollowingcausesredtides?a. Redalgae(Rhodophyta)b. Dinoflagellatesc. Diatomsd. (a),(b)and(c)arecorrect

75. Theevolutionaryinnovationsthatfirstappearedamongthegymnosperms(i.e.,notseeninbryophytesandseedlessvascularplants)include:

a. Heterosporyb. Truerootsc. Retentionofthefemalegametophyteonthematernalsporophyted. Presenceofxylemelements

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