2211601 0 - ib-biology-roundtablesl...biology standard level paper 1 ... – 2 –...
TRANSCRIPT
2211-6010 14 pages
M11/4/BIOLO/SPM/ENG/TZ1/XX
Wednesday 18 May 2011 (afternoon)
BiologyStandard levelPaPer 1
INSTRUCTIONS TO CANDIDATES
• Do not open this examination paper until instructed to do so.• Answer all the questions.• For each question, choose the answer you consider to be the best and indicate your choice on
the answer sheet provided.
45 minutes
©International Baccalaureate Organization 2011
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1. Thetablebelowshowsthelevelofhemoglobinmeasuredintwodifferentgroupsofathletes.
Hemoglobin /grams per 100 cm3
Number of athletes tested
Standard deviation /grams per 100 cm3
Group A 12.6 200 0.8
Group B 11.9 220 3.2
Whichofthefollowingstatementsiscorrect?
A. ResultsfromgroupBaremoreaccuratebecausemoreathletesweretested.
B. ResultsfromgroupBaremorereliablebecauseithasahigherstandarddeviation.
C. More athletes have their hemoglobin concentration close to the mean in groupA than in groupB.
D. Theseresultsindicatethatthelevelofhemoglobinfollowsanormaldistribution.
2. Whichofthefollowingwillcontributetothecelltheory?
I. Livingorganismsarecomposedofcells.
II. Allcellscomefrompre-existingcellsbymitosis.
III. Cellsarethesmallestunitsoflife.
A. Ionly
B. IIonly
C. IandIIIonly
D. I,IIandIII
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3. Aredbloodcellis8μmindiameter.Ifdrawn100timeslargerthanitsactualsize,whatdiameterwillthedrawingbeinmm?
A. 0.08mm
B. 0.8mm
C. 8mm
D. 80mm
4. Acellhascytoplasm,acellwall,nakedDNAandribosomes.Basedonthisinformation,whattypeofcellcouldthisbe?
A. Acellfromapinetree
B. Agrasshoppercell
C. Ahumanredbloodcell
D. Abacterium
5. Whatdodiffusionandosmosishaveincommon?
A. Theyonlyhappeninlivingcells.
B. Theyrequiretransportproteinsinthemembrane.
C. Theyarepassivetransportmechanisms.
D. Netmovementofsubstancesisagainsttheconcentrationgradient.
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6. Thediagrambelowshowsacellduringmitosis.
I
II
Chromosomes
Whatarethestructuresandstageofmitosis?
Stage of mitosis Structure I Structure II
A. metaphase chromatid nuclearmembrane
B. anaphase centromere plasmamembrane
C. anaphase chromatid nuclearmembrane
D. metaphase centromere plasmamembrane
7. Whichofthefollowingareconnectedbyhydrogenbonds?
A. Hydrogentooxygenwithinamoleculeofwater
B. PhosphatetosugarinaDNAmolecule
C. BasetosugarinaDNAmolecule
D. Hydrogentooxygenbetweentwodifferentmoleculesofwater
}
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8. Thegraphbelowshowstheeffectofsubstrateconcentrationonenzymeactivity.WhatconclusioncanbedrawnaboutsectionXofthegraph?
Enzymeactivity
Substrateconcentration
A. Theenzymehasstartedtodenatureandthereactionslowsdown.
B. Thereactionhasfinishedandthesubstratehasbeenusedup.
C. Theenzymeissaturatedandisworkingatitsmaximumreactionrate.
D. Someoftheenzymehasbeenconsumedandthereactionhasreachedaplateau.
9. Whichtypeofmoleculeisshowninthediagrambelow?
A. Peptide
B. Carbohydrate
C. Lipid
D. Nucleicacid
C
H
OH
2CHH
NC
O
C
O
2CH
SH
C
H
N
H
OHC
O
C
H
OH
2CHH
H N
{
X
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10. ThepercentageofthymineintheDNAofanorganismisapproximately30%.Whatisthepercentageofguanine?
A. 70%
B. 30%
C. 40%
D. 20%
11. Whatisdenaturation?
A. Astructuralchangeofaproteinthatresultsinthelossofitsbiologicalproperties
B. Achangeinthegeneticcodeofanorganism
C. Achangeintheaminoacidsequenceofaproteincausingadisruptionofits3Dshape
D. Theprocessbywhichaminoacidsarebrokendownandammoniaisreleased
12. Howdocellscapturetheenergyreleasedbycellrespiration?
A. Theystoreitinmoleculesofcarbondioxide.
B. Theyproduceglucose.
C. Theenergyisreleasedaspyruvate.
D. TheyproduceATP.
13. Whatisthesourceoftheoxygenreleasedintotheairasaproductofphotosynthesis?
A. Chlorophyll
B. Carbondioxideonly
C. Wateronly
D. Bothwaterandcarbondioxide
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14. Whichofthefollowingstatementsabouthomologouschromosomesiscorrect?
A. Eachgeneisatthesamelocusonbothchromosomes.
B. Theyare twoidenticalcopiesofaparentchromosomewhichareattachedtooneanotherat thecentromere.
C. Theyalwaysproduceidenticalphenotypes.
D. Theyarechromosomesthathaveidenticalgenesandalleles.
15. Whathappensincrossingover?
A. Exchangeofgeneticmaterialbetweenhomologouschromosomes
B. Exchangeofgenesduringmetaphaseofmitosis
C. Randomdistributionofchromosomesduringmeiosis
D. Homologouschromosomesfailtoseparateduringmeiosis
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16. Thepedigreechartbelowshowsthebloodtypesofthreemembersofafamily.
Whichcouldbethebloodtypesofindividuals1and2?
Individual 1 Individual 2
A. A AB
B. AB B
C. O B
D. B A
17. Whichofthefollowingtypesofinformationareneededtoconstructakaryotype?
I. Sizeofthechromosomes
II. Genemutationsofthechromosomes
III. Ageoftheindividual
A. Ionly
B. IIonly
C. IandIIonly
D. I,IIandIII
1
2
Blood Group A
Blood Group A Blood Group O
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18. Awomanwhoisacarrierforhemophiliaandamanwhodoesnothavehemophiliahaveachild.Whatistheprobabilitythatthechildwillhavehemophilia?
If it is a girl If it is a boy
A. 0% 50%
B. 0% 0%
C. 50% 50%
D. 50% 0%
19. Whichenzymesareneededtoproducerecombinantplasmidstobeusedingenetransfer?
A. DNApolymeraseandDNAligase
B. DNApolymeraseandrestrictionenzyme(endonuclease)
C. TranscriptaseandRNApolymerase
D. Restrictionenzyme(endonuclease)andDNAligase
20. Whichofthefollowingisthebestdefinitionofapopulation?
A. Agroupofindividualsthatcaninterbreedandproducefertileoffspring
B. Thenumberofindividualsofthesamespeciesinagivenarea
C. Agroupofspecieslivingandinteractingwitheachotherinagivenarea
D. Thetotalnumberofindividualsinagivenarea
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21. Thediagrambelowshowsasimplifiedfoodweb.
Whatistheroleofthesnakeinthisfoodweb?
A. Primaryconsumer
B. Secondaryconsumer
C. Tertiaryconsumer
D. Producer
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22. Thegraphbelowrepresentsasigmoid(S-shaped)populationgrowthcurve.Threesectionsofthecurveareindicated(1,2and3).
Inwhichofthesectionsisnatalityplusimmigrationgreaterthanmortalityplusemigration?
Numbers
Time
A. 1only
B. 2only
C. 1and2only
D. 3only
23. Whatisevolution?
A Ameasureoftherelativesurvivalandreproductivesuccessofanindividual
B. Acumulativechangeinthegeneticallycontrolledcharacteristicsofapopulation
C. Aphysicalchangeduringanorganism’slifethatisinheritedbyitsoffspring
D. Arandomchangeintheproportionsofallelesfromgenerationtogeneration
1
23
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24. Twodifferent treeshavebeenclassifiedasPinus pineaandPinus nigra. Whichof thefollowingstatementsiscorrect?
A. Bothtreesbelongtothesameclassbutadifferentgenus.
B. Bothtreesbelongtothesamefamilyandsamegenus.
C. ThespeciesnameofbothtreesisPinus.
D. Thefamilynamesarepinea and nigra.
25. Celiac disease causes the destruction of the villi cells. Whichof the following ismost likely tohappentopeoplewithceliacdisease?
A. Incompletedigestionoffats
B. Poorabsorptionofcalcium
C. Increasedlevelsofglucoseinblood
D. Damageintheesophaguscausedbyincreaseinacidcontentofthestomach
26. Isthebloodintheaorta,leftventricleandpulmonaryarteryoxygenatedordeoxygenated?
Aorta Left ventricle Pulmonary artery
A. oxygenated deoxygenated deoxygenated
B. deoxygenated oxygenated oxygenated
C. oxygenated oxygenated deoxygenated
D. oxygenated oxygenated oxygenated
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27. Whichofthefollowingstatementsaboutantibodiesiscorrect?
A. Antibodiesarepolypeptides.
B. Antibodiesareproducedbythebonemarrow.
C. Antibodiesarepathogenicforeignsubstances.
D. Antibodieskillbacteriabutnotviruses.
28. Whatnormallypreventsthemembranesofthealveolifromstickingtogetherduringexpiration?
A. Thethicknessofthesingle-celllayerofalveolimembranes
B. Thesecretionoffluidsintheinnersurfaceofthealveoli
C. Thepressurewithinthethoraciccavity
D. Thedensenetofcapillariescoveringthealveoli
29. Whichwordsfromthetablebelowcompletethesentencecorrectly?
In the pancreas,________secrete glucagon, which________blood glucose levels.
I II
A. αcells raises
B. βcells raises
C. αcells lowers
D. βcells lowers
I II
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30. Thediagrambelowshowsthemalereproductivesystem.
Whicharetheepididymisandtheseminalvesicleinthediagram?
Epididymis Seminal vesicle
A. IV I
B. III II
C. I V
D. III I
I
II
III IV
V