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SULIT 4551t3Answer all questions.Jawab semua soalan.

I A group of students carried out an experiment to study the effect of light intensity on the rate ofphotosynthesis.Diagram 1 shows the apparatusset-up to collect the gas produced when the aquaticplantreceived different intensities of light.The aquaticplant was illuminated from a lighted bulb of 40 watts for periods of 5 minutesat five differentdistances, , from the bulb. At the end of each 5 minuteperiod,a gasbubble was drawn nto the capillary tubeusing a syringe.The lengthof the gas bubble was measured sing a ruler and recorded.The temperature n the water bath was maintained at 25"C throughout this experiment.Sekumpulanmurid menjalankan eksperimen untuk mengkaji kesan keamatan cahaya ke atas kadarfotosintesis.Rajah I menunjukkan usunan adas untuk mengumpulgas yang dihasilkan apabila suatu tumbuhanakuatikmenerimakeamatancahayayang berbeza.Turnbuhanakuatik itu telah didedah kepada cahaya daripada mentol menyala, 40 watt untuk tempoh 5 minitpada lima jarak yang berbeza,d" daripada mentol. Pada akhir setiap tempoh5 minit itu, satu gelembunggasdimasukkan e dalam tiub kapilari menggunakan atupicagari. Panjanggelembunggas diukur menggunaknnpembarisdan dicatat.Suhu dalam kukus air dikekalkan pada 25"C sepanjang eksperimen ni.

Capillary ubeTiubkapilari

0.027oSodiumhydrogencarbonate olution0.02Votrutan natrium idrosen arbonat

Diagram IRajah I

SyringePicagariGasbubblecollectedGelembungasdikumpul

l l :l_-s--q-v ,F

@ 2009 Hak Cipta Kerajaan Malaysia 188 SULIT

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4ssu3Table 1 showspart of the capillary tube which contain he gas bubble collectedat different lightintensities.Jadual I menunjukkan ebahagian aripada tiub kapilari yan! mengandungi elembung asyangdikumpulpada keamatancahayayang berbeza.

(a) Using the ruler provided on page 189,measureaccurately he lengths of the gas bubblesfor the different light intensities.Record the readings n the spacesprovided in Table 1.Menggunakanpembaris yang disediakan di halaman 189, ukur dengangelembunggas bagi keamatancahayayang berbeza.Rekodbacaan tu dalam ruangyang disediakandalam Jadual l.

189 [Lihat halaman sebelah]SULIT

Table 1Jadual I

tepat panjang

[3 marlcs][3 markah]

Distance fromthe bulb (cm)Jarak daripadamentol(cm\Length of gasbubble (cm)Panjanggelembunggas (cm)

d=50cmGas bubbleGelembung as Water

I Ai rt l_cm

d=40cm_cm

d=30cm_cm

d=20cm_cm

d=10cm

_cm

2009 Hak Cipta Kerajaan Malaysia

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ForExaminer'sUseSULIT

(b) (D Based on Table 1, state two different observations.Berdasarkan adual l, nyatakan daapemerhatianyang berbeza.Observation1:Pemerhatian :

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Observation 2:Pemerhatian2:

[3 marksl13markahl(ii) State the inference which corresponds o the observations n l(b)(i).Nyatakan nferensyang sepadandenganpemerhatiand, l(bxi).

lnference rom observation :Inferensdaripadapemerhatian 7:

Inference from observation2'.Inferens daripadapemerhatian2'.

13marksl[3 markah](c) Complete Table 2 basedon this experiment.Lengkapkan adual 2 berdasarkaneksperimenni.

VariablePembolehubah Method to handle the variableCara mengendali pembolehubahManipulated variablePemb ehubah dimanipulas kan

Responding variablePembolehubah ergerakbalas

ConstantvariablePembo ehubah dimalarkan

Table 2Jadual213marksl[3 markah)

1(c)t-=I l3 l@ 2009 Hak Cipta Kerajaan Malaysia 190 SULIT

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(d) Statethe hypothesisfor this experiment.Nyatakanhipotesisbagi eksperimenni.

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13marksl13markah)(e) (i) Construct a table and record all the data collected in this experiment.Your table should have the following titles:Bina satu adual dan rekod semuadata yang dikumpuldalam eksperimenni.Jadual anda hendaklahmengandungi aiuk+ajuk berikut:

- Distance from the bulbJarak daripada mentol- Length of gas bubblePanjanggelembung as- Rate of photosynthesisI Lensth of sasbubble I

lRate of photosynthesis -=#-ll "TimelKadar fotosintesisI Panianppelembunp daralI Kadar fotosintesis= + |I Masa l

f3 marksl13markahl(ii) Use the graph paper provided on page 192 to answer this part of the question.Using the data in l(e)(i), draw the graph of the rate of photosynthesisagainst thedistance rom the bulb.Gunakertqsgraf yang disediakandi halaman192 untuk menjawabceraian soalan ni.Menggunakandata di l(e)(i), lukis graf kadar fotosintesismelawan arak daripadamentol.

13mnrksl[3 mnrkah]2009HakCiptaKerajaanMataysia l9l ll.ihat halaman sebelah],SULIT

ForExaminer'sUse1(d)t-JI l3l

1(eXii)[=I l3l

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SULITGraph of the rate of photosynthesisagainst the distance rom the bulb.Graf kadar otosintesismelawanarak daripadamentol.

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4551.13(0 Basedon the graph in l(eXii), explain the relationship between he rate of photosynthesisand the distance from the bulb.Berdasarkangral d; laq1i), terangkanhubunganantara kadar fotosintesisdengan arakdaripadamentol.

13markslf3 marknhl(g) Based on the result of this experiment, state the operational definition for the process ofphotosynthesis.Berdaiarkan keputusan eksperimen ini, nyatakan definisi secara operasi bagi proses

fotosintesis.

f3 marksl13markahl

Another group of studentscarried out the sameexperiment.The aguatigplant was exposedtoa simriar lighted bulb at a distanceof 30 cm using 0.057osodium hydrogen carbonatesolution.Predict the outcome of this experiment' Explain your prediction'sekumpulanmuridyang lain melnialankan ksperiminyang sama.Tumbuhan kuatik tu telahdidedahkankepadamentol menyalayanS serupapada jarak 30 cm menggunakan '05volarutan natrium hidrogen karbonat.Ramalkanhasil eksperimenni. Terangkan amalananda'

13marksl13markahl

(h)

(r) using the list providedbelow, in Table 3, classify he requirementso carry out theprocess f photosynthesisnd heproductsobtained' ,I wut"r. Lieht, Oxvgen,Glucose,Carbondioxide,Chlorophyll It - - -Menggunakan senarai y."g ditrdi"kt" di bawah, dalam Jadual 3, klasifikasikan keperluanuntuL menialankan roses otosintesisdan hasil Wng diperoleh'

13marksf13markahlhalaman sebelahl

ProductsHusilequirementsKeperluan

193

ForExaminer'sUse

1.(e)t-;I l3 l

1(i)r-=I l3 lTotal Ir-=t i? ll l " - l

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SULIT 4551/32 SituationHousewife A uses warm water to wash her clothes using washing liquid which contains added eozyme.The cleaning is more effective.SituationUsing the same washing liquid as in situation 1, housewife B usescold water to wash her clothes. Thecleaning is less effective.Situasi 1

Suri rumahA menggunakan ir suamuntukmembasuh akaianmenggunakan ecairpencuciyangmengandungienzim ambahan.Cuciannyaadalah lebih berkesan.Situasi 2Menggunakancecair pencuci yang samadi situasi I suri rumah B menggunakan ir sejuk untuk membasuhpakaian. Cuciannyaadalah kurang berkesan.Based on both situations,design a laboratory experiment to study the effect of temperatureon the rate ofenzyme reaction.The planning of your experiment musdinclude the following aspects:Berdasarkankedua-duasituasi itu, reka bentuksatu eksperimenmakmal untuk mengkaji kesian uhu ke ataskadar tindak balas enzim.Pe ancanganeksp imen anda hendaklahmeliputi aspek- sp k be ikut. Problem statementPernyataanmasalah. Objective of investigationObjektif kajian. HypothesisHipotesis. VariablesPembolehubah. List of apparatusand materialsSenarairadasdan bahan. Technique usedTel

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KERTAS 31 (a)

(b) (i) 1. At a distance of l0 cm from thebulb, the length of the gas bubble is5 cm.Pada jarak l0 cm dari mentol,panjanggelembung daraadalah5 cm.

2. At a distance of 50 cm from thebulb, the length of gas bubble isI cm.Pada jarak 50 cm dari mentol.panjanggelembung asadalah1 cm.(ii) 1. At low light intensity, less gas isproduced showing that the rate ofphotosynthesiss slow.Padakeamatanahaya ang endah, uranggas dihasilkan menunjukkan kadarfotos ntes s yangperlahan.2. At high light intensity, more gasproduced showing that the ratephotosynthesiss fast.Pada keamatan cahaya yang tinggi, lebihbanyak gas dihasilkan menunjukkan kadarfotosintesis yang lebih cepat.

1Sof

(c)

Distance fromthe bulb(cm)Jarak dari mentol(cm.)

I-ength of gasbubble (cm)Panjang gelembunggas (cm)

50 1.040 2.030 3.020 4.010 5.0

VariablePembolehubahMethod to handle thevariableCara mengendalikanpembolehubah

Manipulated:Dimanipulasiknn:Distancebetween thebulb and theplantJarak di antaramentoldengantumbuhan

Place the bulb atdifferent distances romthe plantLetakkanmentolpadajarak yangberbeza aritumbuhan

232

VariablePembolehubahMethod to handle thevariableCara mengendalikanpembolehubah

Responding:Bergerakbalas:The length ofthe gas bubble/the rate ofphotosynthesisPanjanggelembunggas/kadarfotosintesis

Use a ruler to measureand record the length ofthe gasbubble producedll calculate he rate ofphotosynthesis y usingthe formula: Rate ofphotosynthesis= length ofgasbubble/time/minuteGunal

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0.30.2

(ii)Rateof photosynthesiscm/min)Kadarotos ntesis cm/min)

10 20 30 40 50 60Distance cm) Jarak(cm)(f) As the distance increases, the rate ofphotosynthesis decreases,because the lightintensity decreasesand less gas is produced.Semakin ertambaharak, semakin endahkadar

fotosinte iske anakeamatan ahayabe kuran andan kuranggasdihasilkan.(g) Photosynthesis s the process hat takes placein an aquatic plant. It requires light from thebulb and sodium hydrogen carbonatesolutionand produces gasbubbles.Fotosintesisadalah proses yang berlaku padatumbuhanakuatik. Ia memerlukan ahaya danlarutan natrium hidrog,en karbonat sertamenghasilkanelembung as.(h) The length of the gas bubble is more than 3cm because the concentration of sodiumhydrogen carbonate solution increases,moreoxygen is produced.Panjang elembungasadnlah ebihdaripada3cmkeranakepekatanarutannatriumhidrogen arbonatmeningkat,ebih banyakoksigendihasilkan.

( i ) RequirementsKeperluan

ProductsHasil

WaterAi r GlucoseGlukosaCarbon dioxideKarbondioksida OxygenOksipenChlorophyllKlbrofilLightCahaya

Problemstatement: Whatis theeffectoftemperatureon the activity of salivary amylase on starch?Pernyataan masalah: Apakah kesan suhu ke atasaktiviti amilase iur terhadap anji?Objective: To study the effect of temperatureonthe rate of enzyme reactionObjektif: Untuk mengkaji kesan suhu ke atas kadartindakbalasenzimHypothesis: When the temperature ncreases, herate of enzyme eaction ncreases.Hipotesis:Apabilasuhumeningkat,adar indakbalasenzimmeningkat.Variables:Pembolehubah:. Manipulated: Temperatureof the reactionDimanipulasikan: uhu indakbalas. Responding: The rate of erzyme reactionJlThe time taken for the hydrolysis of starch

Bergerakbalas: Kadar tindakbalas enzim.//Masayangdiambiluntukhidrolisiskanji. Constant Volume of enzymel/ConcentrationofenzymeDimalarkan: si paduenzim//KepekatannzimApparatus and materials: Beakers, tile withgrooves, test tube, thermometer, syringe,stopwatch, Bunsen burner, tripod stand, wirega'uze, lass rod, starch suspension,saliva, waterbath. ice cubes. odine solutionRad.as an bahan: Bikar, ubin denganubang, abunguji, termometer,icagari, am randek, enunuBunsen,tungku kaki tiga, kasadawai, rod kaca, ampaiankanji,air liur,,kukusair, kiubais, larutan odinTechnique: Use a stopwatch to record the timetaken for the complete hydrolysis of starchTeknik: Gunakanam randek untuk merekodmasayangdiambil untukhidrolisiskanji yang engkapProcedure:Prosedur:1. Use a syringe to put I ml of O.l7o starch

suspension nto each of the test tubes abelledA1 andB1.Gunakan icagai unn&,mengisi7 rfl, ampaian tnjiO.7Voedahm setbp abung ji berlabel l d/nxBl.