Embed Size (px)
Citation preview
2212-6010 12 pages
M12/4/BIOLO/SPM/ENG/TZ1/XX
Thursday 17 May 2012 (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.• The maximum mark for this examination paper is [30 marks].
45 minutes
©International Baccalaureate Organization 2012
22126010
2212-6010
–2– M12/4/BIOLO/SPM/ENG/TZ1/XX
1. Themeanheight for adultmen in theUnitedStates is 1.78mwith a standarddeviationof 8cm.Whichstatementistrue?
A. ThetallestmanintheUnitedStatesis1.86mtall.
B. 68%ofmenintheUnitedStatesarebetween1.74mand1.82mtall.
C. 68%ofmenintheUnitedStatesarebetween1.70mand1.86mtall.
D. 100%ofmenintheUnitedStatesarewithintwostandarddeviationsof1.78m.
2. Whichpropertymakesstemcellssuitablefortherapeuticuse?
A. Theycandividebymeiosistoformgametes.
B. Theycontainchemicalsthatcankillbacteria.
C. Theirchromosomesaresuitableforgenetransferandcloning.
D. Theycandifferentiateintospecializedcells.
3. Whichfeaturesarepresentinprokaryoticcells?
A. DNA,plasmamembraneandmitochondria
B. DNA,cellwallandpili
C. ribosomes,chloroplastsandcellwall
D. cytoplasm,ribosomesandroughendoplasmicreticulum
4. Whereinthecelldocondensationreactionsinvolvingaminoacidsoccur?
A. Nucleus
B. Golgiapparatus
C. Ribosomes
D. Lysosome
2212-6010
–3–
Turn over
M12/4/BIOLO/SPM/ENG/TZ1/XX
5. Whichprocessispossibleduetothefluidityofcellmembranes?
A. Endocytosis
B. Osmosis
C. ATPproduction
D. Cellrecognition
6. InwhichstageofmitosisisthecelllabelledX?
X
A. Anaphase
B. Interphase
C. Metaphase
D. Prophase
7. Betweenwhichatomsdohydrogenbondsforminwater?
A. Oxygenandhydrogenatomsinthesamewatermolecule
B. Oxygenandhydrogenatomsindifferentwatermolecules
C. Hydrogenatomsinthesamewatermolecule
D. Oxygenatomsofdifferentwatermolecules
2212-6010
–4– M12/4/BIOLO/SPM/ENG/TZ1/XX
8. Whichcarboncompoundproducedbylivingorganismsisinorganic?
A. DNA
B. Cellulose
C. Glucose
D. Carbondioxide
9. WhatoccursduringDNAreplication?
A. DNApolymeraseseparatesthetwoDNAstrands.
B. DNAmoleculescontainingnucleotidesfromtheoriginalmoleculeareproduced.
C. Adenineformsabasepairwitheitherthymineoruracil.
D. Newbasesattachtotheoriginalsugar-phosphatebackbone.
2212-6010
–5–
Turn over
M12/4/BIOLO/SPM/ENG/TZ1/XX
10. Whichgraphshowstheeffectofincreasingthesubstrateconcentrationonenzymeactivity?
A. Enzymeactivity
B. Enzymeactivity
Substrateconcentration Substrateconcentration
C. Enzymeactivity
D. Enzymeactivity
Substrateconcentration Substrateconcentration
11. Whichchemicalisproducedduringbothaerobicandanaerobicrespirationinhumans?
A. Carbondioxide
B. Pyruvate
C. Water
D. Lactate
2212-6010
–6– M12/4/BIOLO/SPM/ENG/TZ1/XX
12. Howisoxygenproducedduringphotosynthesis?
A. WatermoleculesaresplitwithenergyfromATP.
B. Watermoleculesaresplitwithenergyfromlight.
C. CarbondioxidemoleculesaresplitwithenergyfromATP.
D. Carbondioxidemoleculesaresplitwithenergyfromlight.
13. Thesequenceofthefirstsixaminoacidsofthenormalβhemoglobin(HbA)chainarelisted.
valine–histidine–leucine–threonine–proline–glutamicacid
Which sequence of amino acids could there be in the first six amino acids of the sickle-cellβhemoglobin(HbS)chain?
A. glutamicacid–histidine–leucine–threonine–proline–valine
B. valine–valine–histidine–leucine–threonine–proline
C. glutamicacid–histidine–leucine–threonine–proline–glutamicacid
D. valine–histidine–leucine–threonine–proline–valine
14. Ifthereare16chromosomesinacellthatisabouttodivide,whatwillbethenumberofchromosomesinadaughtercellafterdivisionbymitosisormeiosis?
Mitosis Meiosis
A. 16 16
B. 16 8
C. 8 16
D. 8 8
2212-6010
–7–
Turn over
M12/4/BIOLO/SPM/ENG/TZ1/XX
Questions 15 and 16 refer to the following information.
Aman has hemophilia, a condition caused by a recessive sex-linkedallelecarriedontheXchromosome.
15. Whichofhisgrandparentsmustbeacarrierifnoneofthemhadthedisease?
A. Maternalgrandmother(hismother’smother)
B. Maternalgrandfather(hismother’sfather)
C. Paternalgrandmother(hisfather’smother)
D. Paternalgrandfather(hisfather’sfather)
16. Hiswifedoesnotcarrythehemophiliaallele.Whatwouldbeexpectedintheirchildren?
Sons Daughters
A. allnormal allcarriers
B. halfhemophiliac allcarriers
C. allnormal halfcarriers
D. halfhemophiliac allnormal
17. Whatmakesgenetransferbetweenspeciespossible?
A. Allspeciesusethesamegeneticcode.
B. Allspecieshavethesamegeneticmaterial.
C. Allspeciesproducethesamepolypeptides.
D. Allspeciestranscribegenesusingplasmids.
2212-6010
–8– M12/4/BIOLO/SPM/ENG/TZ1/XX
18. Inapond,twospeciesoffishfeedoninsectsandworms.Theinsectsfeedonthegreenplantsthatliveinthewater.Whatconstitutesapopulationinthisecosystem?
A. Allthelivingorganisms
B. Alltheanimals
C. Allthefish
D. Allthefishofonespecies
19. Whatisrecycledinanecosystem?
A. Nitrogen,carbonandenergyareallrecycled.
B. Nitrogenandcarbonarerecycledbutnotenergy.
C. Nitrogenisrecycledbutnotcarbonorenergy.
D. Nitrogen,carbonandenergyarenotrecycled.
20. Inapopulationofrabbitsstudiedoveraperiodofsixmonths,itwasfoundthatnatalitywasgreaterthanmortalityandemigrationwasgreaterthanimmigration.Whatcanbeconcludedaboutthefinalpopulationofrabbits?
A. Itwillhaveincreased.
B. Itwillhavedecreased.
C. Itwillbeexactlythesame.
D. Thereisnotenoughinformationtomakeavalidconclusion.
21. Whatcharacteristicsdescribehomologousstructures?
A. Theyhavethesameancestraloriginbutmayhavedifferentfunctions.
B. Theyhavethesameancestraloriginandalwayshavethesamefunction.
C. Theyhavedifferentancestraloriginsandmayhavedifferentfunctions.
D. Theyhavedifferentancestraloriginsbutalwayshavethesamefunction.
2212-6010
–9–
Turn over
M12/4/BIOLO/SPM/ENG/TZ1/XX
22. The Atlantic cod (Gadus callarias) is a fish which lays about 5000000 eggs in its lifetime.Onaverage,onlytwooftheseeggssurvivetobecomeadultcod.Howdoesthispromoteevolution?
A. Alloffspringaregeneticallyidentical,sobecomebetteradapted.
B. Layingmanyeggsprovidesfoodforotherspeciestosurviveandbecomebetteradapted.
C. Some young cod change to become adapted to the environment and survive and pass ontheirgenes.
D. Offspringwithfavourablevariationssurviveandpassontheirgenes.
23. Basedonbinomialnomenclature,whichtwospeciesaremostcloselyrelated?
I. Commonbarberry(Berberis vulgaris)
II. Canadianbunchberry(Cornus canadensis)
III. Smoothblackberry(Rubus canadensis)
IV. Canadianbarberry(Berberis canadensis)
A. IandIV
B. IIandIII
C. IIandIV
D. IIIandIV
2212-6010
–10– M12/4/BIOLO/SPM/ENG/TZ1/XX
24. Thediagrambelowshowsthehumandigestivesystem.
Inwhichpartsofthedigestivesystemaremostwaterandglucoseabsorbed?
Water Glucose
A. II I
B. II III
C. III II
D. III III
2212-6010
–11–
Turn over
M12/4/BIOLO/SPM/ENG/TZ1/XX
25. Whatistheconditionofthevalvesoftheheartwhentherightventricleiscontracting?
Atrio-ventricular valve Semilunar valve
A. open open
B. open closed
C. closed closed
D. closed open
26. WhateffectdoesHIVhaveontheimmunesystem?
A. Itpreventsleucocytesfromfightingbacteriabyphagocytosis.
B. Itcausesexcessiveproductionofleucocytesinbonemarrow.
C. Itdestroysantibodiesproducedbyleucocytes.
D. Itlowersthenumberofleucocytes,reducingantibodyproduction.
27. Whatisasimilaritybetweenarteriesandcapillaries?
A. Theybothhaveelastictissue.
B. Theybothhavesmoothmusclecells.
C. Neitherhascollagenfibresintheirwalls.
D. Neitherhasvalves.
28. Whatisacharacteristicofaxonsinmotorneurons?
A. Whenthereisarestingpotential,theoutsideoftheaxonisnegativerelativetotheinside.
B. Duringanactionpotential,Na+ionsdiffuseoutoftheaxon.
C. K+ionsdiffusingoutoftheaxonrepolarizesit.
D. Impulsesintheaxontraveltowardsthecellbody.
2212-6010
–12– M12/4/BIOLO/SPM/ENG/TZ1/XX
29. Whichresponsetakesplacewhenbloodglucoselevelsarelow?
A. Glucagonisreleasedfromtheαcellsofthepancreaticislets.
B. Glucagonisreleasedfromtheβcellsofthepancreaticislets.
C. Insulinisreleasedfromtheαcellsofthepancreaticislets.
D. Insulinisreleasedfromtheβcellsofthepancreaticislets.
30. Duringthemenstrualcycle,whatoccursinresponsetoafallintheprogesteronelevel?
A. Growthoftheuteruslining
B. Growthofthefolliclesurroundingtheegg
C. Ovulation
D. Menstruation
