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
