2208-6010 14 pages

M08/4/BIOLO/SPM/ENG/TZ1/XX

Wednesday 14 May 2008 (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 2008

22086010

2208-6010

–2– M08/4/BIOLO/SPM/ENG/TZ1/XX

1. Whatdescribestissues?

A. Groupsofcellsthatdevelopthesamewaywiththesamefunction

B. Groupsofcellsthatdevelopthesamewaywithdifferentfunctions

C. Groupsofcellsthathavecombinedtoformastructure

D. Groupsofcellsthathavecombinedtoformoneorgan

2. Whichpairoffeaturesiscorrectforbothplantandprokaryoticcells?

Plant cell Prokaryotic cell

A. Abletochangeshape Fixedshape

B. ContainsDNAassociatedwithprotein ContainsnakedDNA

C. DNAenclosedbymembrane DNAassociatedwithprotein

D. Chloroplastsmaybepresent Chloroplastsmaybepresent

2208-6010

–�–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

3. Thediagramshowsamodelofabiologicalmembrane.WhatdolabelsI,II,andIIIillustrate?

III

II

I

I II III

A. Integralprotein Peripheralprotein Hydrophobicphosphatehead

B. Peripheralprotein Glycoprotein Hydrophilicphosphatehead

C. Glycoprotein Integralprotein Hydrophilicphosphatehead

D. Glycoprotein Peripheralprotein Hydrophobicphosphatehead

2208-6010

–4– M08/4/BIOLO/SPM/ENG/TZ1/XX

4. Whatdescribesthefunctionsofthefollowingorganelles?

Golgi apparatus Rough endoplasmatic reticulum

A. Synthesisofproteins forcellsecretion

ATPproduction

B. ATPproduction Synthesisofproteins forcellsecretion

C. Synthesisofproteins forcellsecretion

Processingofproteins

D. Processingofproteins Synthesisofproteins forcellsecretion

5. Whatarecomponentsofviruses?

I. Nucleicacid II. Protein III. Lysosome

A. Ionly

B. IandIIonly

C. IandIIIonly

D. IIandIIIonly

2208-6010

–�–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

6. Whatroledoesironplayinlivingorganisms?

A. Asacomponentinnucleicacids

B. Asacomponentoflipids

C. Asacomponentofcarbohydrates

D. Asacomponentofproteins

7. Whichdiagramcorrectlyillustratesadipeptide?

A.

N

H

H

C

H

H

C

O

N

H

C

H

H

C

O

OH

B.

N

H

H

C

H

H

C

O

N

H

C

H

H

C

O

OH

C.

N

H

H

C

H

H

C

H

N

H

C

H

H

C

O

OH

D.

N

H

H

C

H

H

C

O

N

H

C

H

H

C

O

OH

8. WhatarethecomponentsofaDNAnucleotide?

A. deoxyribose,aphosphateandoneofthebases:adenine,cytosine,guanineorthymine

B. ribose,aphosphateandoneofthebases:adenine,cytosine,guanineoruracil

C. deoxyribose,anitrateandoneofthebases:adenine,cytosine,guanineorthymine

D. ribose,anitrateandoneofthebases:adenine,cytosine,guanineorthymine

2208-6010

–6– M08/4/BIOLO/SPM/ENG/TZ1/XX

9. Whatisthecorrectsequenceofchemicalsproducedintheanaerobicrespirationpathway?

A. lactate→pyruvate→ethanol

B. ethanol→pyruvate→glucose

C. glucose→lactate→pyruvate

D. glucose→pyruvate→lactate

10. Whydoleavesofplantslookgreen?

A. Most of the green light is absorbed by chlorophyll and most of the red and blue light isreflected.

B. Most of the blue light is absorbed by chlorophyll and most of the red and green light isreflected.

C. Most of the red light is absorbed by chlorophyll and most of the green and blue light isreflected.

D. Most of the red and blue light is absorbed by chlorophyll and most of the green light isreflected.

11. HowwouldthefollowingDNAsequence,ACGTTGCATGGCA,betranscribed?

A. UGCAACGUACCGU

B. TGCAACGTACCGT

C. ACGTTGCATGGCA

D. ACGUUGCAUGGCA

2208-6010

–�–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

12. Whatcanbeconcludedonthebasisofthefollowingkaryotype?

A. Femalewithanormalsetofchromosomes

B. MalewithDownsyndrome

C. FemalewithDownsyndrome

D. Malewithanormalsetofchromosomes

13. Whatarehomologouschromosomes?

A. Twochromosomeswithdifferingsetsofgenes,inthesamesequence,withthesamealleles

B. Twochromosomeswiththesamesetofgenes,inadifferentsequence,withthesamealleles

C. Twochromosomeswithadifferentsetofgenes,inthesamesequence,withdifferentalleles

D. Twochromosomeswiththesamesetofgenes,inthesamesequence,sometimeswithdifferentalleles

1 2 � 4 �

6 8� 9 10 11 12

1� 1�14 16 1� 18

19 20 21 22

xx

2208-6010

–8– M08/4/BIOLO/SPM/ENG/TZ1/XX

14. WhichfeaturesofDNAfragmentsareusedtoseparatethemintheprocessofgelelectrophoresis?

A. Theirchargeandtheirsize

B. Theirchargeandbasecomposition

C. Thesequenceoftheirbasesandtheircharge

D. Theirbasecompositionandtheirsize

15. Whichfeatureofageneticpedigreechartdemonstratesthatacharacteristicissexlinked?

A. Numbersofoffspringcarryingthecharacteristicdecreasedoverseveralgenerations.

B. Onegenderismorecommonlyaffectedthantheother.

C. Equalnumbersofmalesandfemalesinheritthecharacteristic.

D. Boysandgirlsonlyinheritthecharacteristicfromtheirmothers.

16. WhatdoesthegenotypeXHXhindicate?

A. Aco-dominantfemale

B. Aheterozygousmale

C. Aheterozygousfemale

D. Aco-dominantmale

17. Ifapurpleflowered(Pp)andawhitefloweredpeaplant(pp)arecrossed,whatwill theoffspringbe?

A. 1:1ratioofpurpleandwhiteflowers

B. 3:1ratioofpurpletowhiteflowers

C. 1:3ratioofpurpletowhiteflowers

D. Allpurpleflowers

2208-6010

–9–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

18. Whatisacommunity?

A. Agroupofproducersandconsumerslivingandinteractinginanarea.

B. Agroupofspecieslivingandinteractinginanarea.

C. Agroupoforganismslivingandinteractinginanarea.

D. Agroupofpopulationslivingandinteractinginanarea.

19. Whatarethemainsourcesofcarbondioxideonearth?

A. cellularrespirationofconsumers,producersandcombustionoffossilfuels

B. photosynthesisandcellularrespirationofconsumers

C. cellularrespirationofproducersandcombustionoffossilfuels

D. photosynthesisandcombustionoffossilfuels

20. Theaverageleaflengthofoneplantis2.�cmwithastandarddeviationof0.�cm.Whatdoesthisindicate?

A. 9�%ofallleavesfallwithintherangesof2.0to�.0cm

B. 68%ofallleavesfallwithintherangesof1.�to�.�cm

C. 68%ofallleavesfallwithintherangesof2.�to�.0cm

D. 9�%ofallleavesfallwithintherangesof1.�to�.�cm

21. WhatareAllium sativaandAllium cepa?

A. Twodifferentspeciesofthesamegenus

B. Thesamespeciesofthesamegenus

C. Thesamespeciesbutofadifferentgenus

D. Twodifferentspeciesofadifferentgenus

2208-6010

–10– M08/4/BIOLO/SPM/ENG/TZ1/XX

22. This diagram represents a simple food chain. In which ways is energy lost between the trophiclevels?

Plant Caterpillar Frog Snake

Owl

I. Heatlossthroughcellrespiration II. Materialnotconsumed III. Materialnotassimilated

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

23. Inthedigestivesystem,enzymeAhasanoptimumpHof1.�andenzymeBanoptimumpHof�.Whatarethepossiblesubstratesoftheseenzymes?

Enzyme A Enzyme B

A. proteins aminoacids

B. lipids proteins

C. carbohydrates lipids

D. proteins lipids

2208-6010

–11–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

24. Whichprocessesarerepresentedbythelabelsinthediagrambelow?

I

II

I II

A. A phagocyte ingesting a microbe byexocytosis.

DigestionofthemicrobewiththehelpoftheGolgiapparatus.

B. A phagocyte ingesting a microbe byendocytosis.

Digestionofthemicrobewiththehelpofalysosome.

C. A phagocyte ingesting a microbe byexocytosis.

Digestionofthemicrobewiththehelpofalysosome.

D. A phagocyte ingesting a microbe byendocytosis.

DigestionofthemicrobewiththehelpoftheGolgiapparatus.

2208-6010

–12– M08/4/BIOLO/SPM/ENG/TZ1/XX

25. Thediagrambelowshowsthehumanmalereproductivesystemandassociatedorgans.

X

Y

Z

Whichofthelabelledstructuresindicatethebladder,prostateandurethra?

Bladder Prostate Urethra

A. Y X Z

B. X Y Z

C. Z X Y

D. X Z Y

2208-6010

–1�–

Turn over

M08/4/BIOLO/SPM/ENG/TZ1/XX

26. Whathappensduringinhalation?

A. Boththeexternalintercostalmusclesandthediaphragmcontract.

B. Theinternalintercostalmusclescontractandthediaphragmrelaxes.

C. Theexternalintercostalmusclesrelaxandthediaphragmcontracts.

D. Boththeinternalintercostalmusclesandthediaphragmrelax.

27. Whichofthefollowingbestdescribesthecompositionofhumanblood?

A. erythrocytes,leucocytesandplatelets

B. erythrocytes,phagocytesandplatelets

C. erythrocytes,lymphocytesandplatelets

D. erythrocytes,antigensandplatelets

28. Whichofthefollowingbestdescribesantibodies?

A. madebyphagocytesandspecifictooneantigen

B. madebylymphocytesandspecifictooneantigen

C. madebyleucocytesandnon-specific

D. madebyphagocytesandnon-specific

2208-6010

–14– M08/4/BIOLO/SPM/ENG/TZ1/XX

29. Whichplayaroleincontrollingbodytemperature?

I. blood II. skinarterioles III. bodyhair

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

30. In a human diet, what effect does a high intake of both protein and salt have on urea and saltconcentrationsofurine?

Urea Concentration Salt Concentration

A. High Low

B. Low High

C. High High

D. Low Low