q1q2 p3 sem 2 f4 2011-edit

Answer all questions

PAGE 21SULIT

Section C

Bahagian C

[50 Marks]

[50 Markah]

Answer all questions

Jawab semua soalan1.A group of students carried out an experiment to study the rate of anaerobic respiration in different volume of yeast suspension.

5 cm3 yeast suspension is mixed with 5 cm3 boiled glucose solution in a boiling tube. Paraffin oil is added on top of the mixture.Diagram 1 shows the set-up of apparatus and the initial temperature of the experiment.The initial temperature is the same in volume of yeast suspensions that are 5cm3, 10 cm3 and 15 cm3.

Sekumpulan pelajar telah menjalankan ekseperimen untuk mengkaji kesan kadar respirasi anaerobik dalam isipadu ampaian yis yang berlainan .Di dalam satu tabung didih, 5 cm3 ampaian yis dicampurkan dengan 5 cm3 larutan glukosa yang telah dididihkan. Minyak parafin ditambahkan di permukaan atas campuran tersebut.

Rajah 1 menunjukkan susunan radas dan suhu awal eksperimen ini.Suhu awal eksperimen adalah sama untuk isipadu ampaian yis 5cm3, 10 cm3 dan 15 cm3.

Diagram 1Rajah 1

Table 1.1 shows the final temperature of the experiment.

Jadual 1.1 menunjukkan suhu akhir eksperimen..

5 cm3 yeast suspension

5 cm3 ampaian yis


10 cm3 ampaian yis15 cm3 yeast suspension

15 cm3 ampaian yis

Final temperature

Suhu akhir

Final temperature

Suhu akhir

Final temperature

Suhu akhir

Table 1.1Jadual 1.1

(a)Record the final temperature in the spaces provided in Table 1.1.Rekod suhu akhir dalam ruangan yang disediakan dalam Jadual 1.1.

[3 marks]

[3 markah]

(b)(i)Based on Table 1, state two different observations.

Berdasarkan Jadual 1, nyatakan dua pemerhatian yang berbeza.

Observation 1

Pemerhatian 1

Observation 2

Pemerhatian 2

[3 marks]

[3 markah]

(ii)State the inferences from the observations in 1(b)(i).

Nyatakan inferens daripada pemerhatian di1(b)(i) .

Inference from observation 1

Inferens daripada pemerhatian 1

Inference from observation 2

Inferens daripada pemerhatian 2

[3 marks]

[3 markah]

(c)Complete Table 1.2 based on this experiment.Lengkapkan Jadual 1.2 berdasarkan eksperimen ini.

Variables

Pembolehubah

Method to handle the variableCara mengendali pembolehubah

Manipulated variable:

Pembolehubah dimanipulasi:

....

...

..

Responding variable:

Pembolehubah bergerak balas:

....

...

..

Controlled variable:

Pembolehubah dimalarkan :

....

...

...

Table 1.2

Jadual 1.2

[3 marks][3 markah]

(d)State the hypothesis for this experiment.

Nyatakan hipotesis bagi eksperimen ini.

[3 marks]

[3 markah]

(e)(i)Construct a table and record the results of the experiment.

Bina satu jadual dan rekodkan keputusan eksperimen.

Your table should have the following titles :-

Jadual anda hendaklah mengandungi tajuk-tajuk berikut :- Volume of yeast suspension

Isipadu ampaian yis

Initial, final and change in temperature readings of the mixture

Bacaan awal, akhir dan perubahan suhu campuran Rate of anaerobic respiration

Kadar respirasi anaerobikUse the formula :-

Gunakan formula :-

Rate of anaerobic respiration = Change in temperature readings (0C) Time (min)

Kadar respirasi anaerobik = Perubahan bacaan suhu (0C) Masa (min)

[3 marks]

[3 markah]

(ii)Using the data in 1(e)(i), draw the graph of the rate of anaerobic respiration against the volume of yeast suspension on the graph paper provided.

Menggunakan data di 1(e)(i), lukis graf kadar respirasi anaerobik melawan isipadu ampaian yis di atas kertas graf yang disediakan.

[3 marks]

[3 markah]

[3 marks][3 markah]

(f)Based on the graph in 1(e)(ii), explain the relationship between the volume of yeast suspension and the rate of anaerobic respiration.

Berdasarkan graf di 1(e)(ii), terangkan hubungan antara isipadu amapaian yis dengan kadar respirasi anaerobik.

[3 marks]

[3 markah]

(g)Another group of students carried out the same experiment. In their experiment, 15 cm3 yeast suspension is mixed with 5 cm3 not boiled glucose solution and no paraffin oil is added.Predict the temperature reading. Explain your prediction.

Sekumpulan pelajar yang lain menjalankan eksperimen yang sama. Dalam eksperimen mereka, 15 cm3 ampaian yis dicampurkan dengan 5 cm3 larutan glukosa yang tidak dididihkan. Tiada minyak parafin ditambahkan.

Ramalkan bacaan suhu. Terangkan ramalan anda.

[3 marks]

[3 markah]

(h)State the operational definition for anaerobic respiration.

Nyatakan definisi secara operasi bagi respirasi anaerobik.

[3 marks]

[3 markah]

(i)Using the list provided below, classify the requirements to carry out the anaerobic respiration and the products obtained in Table 1.3Menggunakan senarai yang disediakan di bawah, klasifikasikan keperluan untuk menjalankan proses respirasi anaerobik dan hasil yang diperoleh dalam Jadual 1.3.

Requirements

Keperluan

Products

Hasil

Table 1.3

Jadual 1.3

[3 marks]

[3 markah]

2.Transpiration process is the loss of water vapour from the leaves to the atmosphere through stomata. This loss of water is replaced by the absorption of water from the soil by the plant roots. The rate of transpiration is affected by temperature, light intensity, air movement and relative humidity.

Proses transpirasi adalah kehilangan wap air dari daun ke atmosfera melalui stomata. Kehilangan air ini diganti oleh proses penyerapan air dari tanah oleh akar tumbuhan.

Kadar transpirasi adalah dipengaruhi oleh suhu, keamatan cahaya, pergerakan udara and kelembapan bandingan.

Based on the above information and Diagram 1, plan a laboratory experiment to study the effect of relative humidity on the rate of transpiration.

Diagram 1 shows the materials and apparatus used in this experiment.

Berdasarkan maklumat dan Rajah 1 di atas, rancang satu eksperimen dalam makmal untuk mengkaji kesan kelembapan bandingan ke atas kadar transpirasi

Rajah 1 menunjukkan bahan dan radas yang digunakan dalam eksperimen ini.The planning of your experiment must include the following aspects:

Perancangan eksperimen anda hendaklah meliputi aspek-aspek berikut: Problem statement

Penyataan masalah Hypothesis

Hipotesis Variables

Pemboleh ubah List of materials and apparatus

Senarai bahan dan radas Experimental procedure

Prosedur eksperimen Presentation of data Persembahan data

[17 marks]

[17 markah]

END OF THE QUESTION PAPER

KERTAS SOALAN TAMAT

SPACE FOR ANSWERSSection:.............................................. Question no:.............................................____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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__________________________________________________________________________________________________________________________________________END OF THE QUESTION PAPERKERTAS SOALAN TAMAT


+ 5 cm3 boiled glucose solution

5 cm3 ampaian yis

+ 5 cm3 larutan glukos yang telah dididihkan

Paraffin oil

Minyak parafin

Thermometer

Termometer

40

30

20

Initial temperature

Suhu awal

For examiners use

For examiners use

Diagram 1

Rajah 1

Polythene bag

Beg politena

Water

Air

C

C

40

30

20

C

1(b)(ii)

60

50

40

For examiners use

1(g)

1(a)

70

60

50

For examiners use

1(b)(i)

For examiners use

1(c)

1(d)

Dehydrated calcium chloride

Kalsium klorida kontang

For examiners use

1(e)(i)

1(f)

1(e)(ii)

Glucose solution, Ethanol, Zymase, ATP, Carbon dioxide Larutan glukosa, Etanol, Zimase, ATP, Karbon dioksida

310C

For examiners use

1(g)

1(i)

1(h)

For examiners use

For examiners use

EMBED PBrush

Graph of the rate of anaerobic respiration against the volume of yeast suspension

Graf bagi kadar respirasi anaerobik melawan isipadu ampaian yis

[ Lihat Sebelah4551/2, 455/3 2011 Hak Cipta Bahagian Pendidikan & Latihan (Menengah) MARA SULIT

q1q2 p3 sem 2 f4 2011-edit

Documents

cm3 dan

initial temperature

temperature readings

markah ccomplete table

berdasarkan jadual

lengkapkan jadual

perubahan bacaan suhu

volume of yeast suspensions