2214-6007 15 pages

M14/4/BIOLO/HPM/ENG/TZ1/XX

Friday 9 May 2014 (afternoon)

BIOLOGYHIGHER 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 [40 marks].

1 hour

© International Baccalaureate Organization 2014

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1. Resultsfromascientificstudyproducedagraphwiththisappearance.

X

Y

Whatcanbeconcludedaboutthestudy?

A. ThestandarddeviationofXishigh

B. 68%ofthepopulationhasthemeanvalueforX

C. ThegraphsuggeststhatYcausesX

D. ThereislittlevariationinX

2. Thoughasinglenervecelldoesnotthink,millionsofthemorganizedasabrainresultinthinking.Whatkindofpropertydoesthinkingrepresent?

A. Anatomical

B. Adaptive

C. Extracellular

D. Emergent

3. Whyarestemcellsusefulinrepairingdiseasedordamagedorgans?

A. Theyarespecialized

B. Theyreproduce

C. Unlimitedquantitiesareavailablefromadulttissue

D. Theycanbetransferredbetweenspecies

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4. Whichstructureshaveaphospholipidbilayer?

I. vesicle

II. nucleus

III. nucleoid

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,II,andIII

5. Whichusuallytakesthemosttimeinthecellcycle?

A. Cytokinesis

B. Interphase

C. Telophase

D. Anaphase

6. Whichisadisaccharide?

A. Fructose

B. Galactose

C. Lactose

D. Ribose

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7. Howmuchenergyisstoredin1kgofbodyfatcomparedto1kgofglycogen?

A. Halfasmuch

B. Sameamount

C. Twiceasmuch

D. Onetenthasmuch

8. Whichelementismostcommoninproteins?

A. Sodium

B. Nitrogen

C. Phosphorus

D. Iron

9. Whichnucleicacidsaredirectlyinvolvedintranscription?

A. mRNAandoneDNAstrand

B. mRNAandbothDNAstrands

C. tRNAandbothDNAstrands

D. tRNAandoneDNAstrand

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10. What is the result after the first meiotic division of one diploid animal cell containing 2nchromosomes?

Number of cells Chromosomes per cell

A. 2 n

B. 2 2n

C. 4 n

D. 4 2n

11. Whichbloodgroupgenotypeshowscodominance?

A. IAIA

B. IBi

C. IAIB

D. ii

12. Whattermdescribesgeneticallyidenticalorganismsderivedfromasingleparent?

A. Species

B. Clone

C. Family

D. Twins

13. Whatprovidesevidencefortheuniversalnatureofthegeneticcode?

A. UracilreplacesthymineinRNA

B. TheamountofAisequaltotheamountofTandtheamountofGisequaltotheamountofC

C. Nucleicacidscontainthesamebasesinallspecies

D. mRNAcodonsareassignedtothesameaminoacidsindifferentspecies

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14. ThediagramshowsasimplifiedLakeMichiganfoodweb.Whichpairoftermsdescribesthetrophicleveloflaketrout?

LakeTrout

BloaterChub

Sculpins Alewife RainbowSmelt

Diporeia Zooplankton

Phytoplankton

A. secondaryconsumer herbivore

B. tertiaryconsumer detritivore

C. secondaryconsumer tertiaryconsumer

D. secondaryconsumer primaryconsumer

15. Howdoestheprecautionaryprincipleaffecttheplanningofpublicprojects?

A. Supportersofanyprojectmustprovethatitwillnotcauseharm.

B. Opponentsofanyprojectmustprovethatitwillcauseharm.

C. Precautionsmustbetakentopreventharmtobiodiversityduringconstructionoftheproject.

D. Precautionsmustbetakentopreventharmtobiodiversityafterconstructionoftheproject.

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16. Whichimagesshowcnidaria?

I. II.

III. IV.

[Source:ImageI:http://en.wikipedia.org/wiki/File:Striped_colonial_anemone.jpgImageII:http://en.wikipedia.org/wiki/Chrysaora#mediaviewer/File:Six-Sea-Nettles.jpg

ImageIII:http://en.wikipedia.org/wiki/Sponge_reef#mediaviewer/File:Aphrocallistes_vastus.jpgImageIV:https://www.flickr.com/photos/rling/4117004436/in/photolist-9RkRe2-7gNHZ7-fXy94L-9RoLGE-4BpZst-7vEWYh-fYoqEy-HBTmE-7ycJTZ-4xPQCf-4BugJu-6WZ43r-cGCT4f-4sRQ6n-jQZqui-x2jYA-65FSvo-axV1Bn-3zZxbQ-bhFtxe-7ygwGu-oq99W-6LvtZu-2jxeXE-6X455o-6e6Jed-b7Kgq-616qYF-5jRYsg-a3fGe7-4txFok-9Jvwq3-6WZ3zB-2kcrN3-8qgaUZ-aHoJre-

4tBJtb-7jbocF-8RX3cj-6X4539-vdArk-6oiVcA-4eD5Q2-cwcT6y-nQfGHe-4fHLVJ-moGP8-AiZHq-7uMTD9-5R2uQ7/lightbox/byRichardLing]

A. IandIIonly

B. IandIIIonly

C. IIandIVonly

D. IIIandIVonly

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17. Whichsequenceoftaxonomicgroupsgoesfromlargesttosmallest?

A. phylum order class species genus

B. kingdom family class genus species

C. phylum class order family species

D. kingdom phylum family order genus

18. Thelongestregionofthelargeintestineisthecolon.Whatisthefunctionofthecolon?

A. Producesenzymes

B. Absorbsfats

C. DestroysE. coli

D. Solidifieswastes

19. Whatdescribesantigens?

A. Theycatalyzeimmunereactions.

B. Theyactivatespecificwhitebloodcells.

C. Theydestroybacteriabutnotviruses.

D. Theyareonlyproducedbywhitebloodcells.

20. Wheredoesgasexchangeoccurinhumans?

A. Mouthandnostrils

B. Alveoliwalls

C. Bronchiolewalls

D. Tracheaandbronchi

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21. Wherecouldanactionpotentialoccurinamotorneuron?

A. Anywhereonthecellmembrane

B. Dendritesonly

C. Cellbodyonly

D. Axononly

22. Whichhormoneconcentrationrisestotriggerovulationduringthemenstrualcycle?

A. Estrogen

B. FSH

C. Progesterone

D. LH

23. Whatmustbepresentforahumanfetustodevelopintoanormalmale?

X chromosome Y chromosome testosterone

A.

B.

C.

D.

24. Whathelpstoregulatetranscription?

A. Nucleosomes

B. DNApolymerase

C. tRNA

D. Ribosomes

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25. In this electronmicrograph of a eukaryotic nucleus, what could be happening toDNA at any of thearrows?

[Source:©PhototakeImage119621.Usedwithpermission.]

I. Replication

II. Transcription

III. Translation

A. I

B. II

C. IorII

D. I,IIorIII

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26. ImmunoglobulinG(IgG)isatypeofantibodyconsistingoffoldedpolypeptidechainsandaboundcarbohydrategroup.Whichlevelofstructurewoulddescribethe3D(threedimensional)shapeof anyoneofthechains?

A. Primary

B. Secondary

C. Tertiary

D. Quaternary

27. Whatisfoundinmitochondriabutnotinchloroplasts?

A. Stroma

B. DNA

C. Enzymes

D. Matrix

28. Whatchangescouldoccurduringoxidation?

hydrogen electrons

A. loss loss

B. loss gain

C. gain gain

D. gain loss

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29. Whatisproducedoverallperglucosemolecule,duringglycolysis?

A. 1pyruvate 2ATP 1NADH

B. 1pyruvate 4ATP 2NADH

C. 2pyruvate 4ATP 1NADH

D. 2pyruvate 2ATP 2NADH

30. Wheredoesthetranslocationofsugarsoccurinaplantstem?

A.

B.C.

D.

31. Towherearepollengrainsdeliveredduringsuccessfulpollination?

A. Style

B. Stigma

C. Ovary

D. Anther

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32. Duringseedgermination,whatcarbohydratemovesfromcotyledonstotheembryo?

A. Fructose

B. Starch

C. Maltose

D. Sucrose

33. Whendohomologouschromosomepairsseparateduringmeiosis?

A. ProphaseI

B. AnaphaseI

C. MetaphaseII

D. AnaphaseII

34. One model for skin colour proposes three separately inherited codominant genes that can affectdarkness.Eachdark-skinallele(P,QorR)contributesoneequalunitofdarkness.Therecessiveallelesdonotcontributetodarkness.WhichgenotypewouldlikelyproducethesameskindarknessasPpQqRr?

A. PpQQRr

B. ppQqRR

C. PpqqRr

D. PPqqRR

35. Duringanimmuneresponse,whatistheclonalselectionphase?

A. SurvivalofindividualswithBcellsneededforimmunitytoadisease

B. GenerearrangementforBcelldiversity

C. ProliferationofaspecificBcell

D. AntibodysecretionbyspecificBcells

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36. Whatistheroleofcartilageintheelbowjoint?

A. Allowseasymovementbetweenbones

B. Secretessynovialfluid

C. Connectstricepsmuscletoforearmbones

D. Preventsdislocationofhumerusfromforearmbones

37. Wheredospermcompletetheirdevelopmentandbecomeabletoswim?

A. Spermduct

B. Seminalvesicle

C. Seminiferoustubules

D. Epididymis

38. Whatistheroleofthecorticalreactioninfertilization?

A. Attractslargenumbersofspermtoanegg

B. Allowstheplasmamembranesofonespermandoneeggtofuse

C. Resultsinformationofsecondpolarbodytoproducehaploidegg

D. Preventsmultiplespermfromfertilizingtheegg

39. Whichstructuralcomponentisrepeatedinamyofibril?

A. Sarcomere

B. Sarcolemma

C. Sarcoplasmicreticulum

D. Nucleus

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40. Thediagramshowsanephronandassociatedbloodvesselsfromahumankidney.Whichstructureproducesahighsoluteconcentrationinthemedulla?

[Source:http://en.wikipedia.org/wiki/File:2618_Nephron_Secretion_Reabsorption.jpg]