Bio3i

Biologi Kertas 3 September 2004 1 1/2 jam

MAKTAB RENDAH SAINS MARA

PEPERIKSAAN PERCUBAAN SPM 2004

BIOLOGI Kertas 3 Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Kertas solan ini mengandungi 9 halaman bercetak  2004 Hak Cipta Bahagian Pendidikan dan Latihan (Menengah) MARA

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2

1. Test tube Distilled water

Potato strip A

0.2 M Sucrose solution

Potato strip B

0.4 M Sucrose solution

0.6 M Sucrose solution

0.8 M Sucrose solution

Potato strip C

Potato strip D

Potato strip E

FIGURE 1 (a)

0 grammes 90

30

60

FIGURE 1 (b) An experiment on osmosis was carried out by immersing potato strips in five solutions of different concentrations. Five potato strips of the same size were weighed. Each was immersed in distilled water and sucrose solutions of 0.2 M, 0.4 M, 0.6 M and 0.8 M. They were left for 30 minutes and then weighed. Figure 1 (a) shows the experimental set up, while Figure 1 (b) shows the initial mass of each potato strip. Table 1 shows the results of the experiment.

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SULIT Potato strip

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3 Solutions

Final mass of potato strip (g)

0 grammes A

Distilled water 90

30

60

0 grammes B

Sucrose 0.2 M

30

90

60

0 grammes C

Sucrose 0.4 M

90

30

60

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Potato strip

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4

Solutions

Final mass of potato strip (g)

0 grammes D

Sucrose 0.6 M

90

30

60

0 grammes E

Sucrose 0.8 M

90

30

60

TABLE 1

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(a)

(i)

5

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Based on Table 1, state two observations from this experiment. 1

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

2

Untuk Kegunaan Pemeriksa/For Examiner’s use

---------------------------------------------------------------------------------------------------

1 (a)(i) KB0601

--------------------------------------------------------------------------------------------------[ 3 marks] (ii)

State one inference from each observation in (a)(i). Observation 1: -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Observation 2: ---------------------------------------------------------------------------------

1 (a)(ii) KB0604

---------------------------------------------------------------------------------------------------[ 3 marks] (b)

(i)

State the variables in this experiment. Manipulated variable : ------------------------------------------------------------------------Responding variable : -------------------------------------------------------------------------Controlled variable

(ii)

:--------------------------------------------------------------------------

Describe how to : manipulate the variable : -------------------------------------------------------------------------------------------------------------------------------------------------------------------------observe the responding variable : ------------------------------------------------------------------------------------------------------------------------------------------------------------------

1 (b)(i) 1 (b)(ii)

set the controlled variable : --------------------------------------------------------------------

KB0610

----------------------------------------------------------------------------------------------------[3 marks]

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(c)

6

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State the hypothesis for this experiment.

Untuk Kegunaan Pemeriksa/For Examiner’s use

1 (c)

--------------------------------------------------------------------------------------------------------------

KB0611

-------------------------------------------------------------------------------------------------------------[ 3 marks] (d)

Construct a table to record the results of this experiment. Your table must contain the following items: - concentration of solutions - mass of potato strips - change in mass of potato strips

1 (d)

Based on the table constructed, draw a graph of change in mass versus concentration of solutions in the graph paper provided on page 8. [ 3 marks]

KB0606

1 (d) KB0603

[ 3 marks]

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7

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Referring to the graph in (d), state the relationship between the concentration of solution and the movement of water in the potato strip. 1

Untuk Kegunaan Pemeriksa/For Examiner’s use

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2

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

3

----------------------------------------------------------------------------------------------------------

1 (e) KB0608

--------------------------------------------------------------------------------------------------------[ 3 marks ] (f)

If another potato strip of the same size and mass is placed in a 1.6 M sucrose solution for 30 minutes, predict the change in mass that will be obtained. ---------------------------------------------------------------------------------------------------------------

1 (f) KB0605

--------------------------------------------------------------------------------------------------------------[ 3 marks ] (g)

Test tube B was left for 60 minutes. Explain the relationship between the mass of potato strips and time. ---------------------------------------------------------------------------------------------------------------

1 (g) KB0607

--------------------------------------------------------------------------------------------------------------[ 3 marks ] (h)

Based on the results and observations of the experiment, state the meaning of osmosis and its effect on the mass of potato strips. ---------------------------------------------------------------------------------------------------------------

1 (h) KB0609

--------------------------------------------------------------------------------------------------------------[ 3 marks ]

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8

(i) In another experiment, a potato strip that was placed in a 0.86% sodium chloride solution remains unchanged.

Based on the above information, classify the following solutions according to their comparative osmotic concentrations: 1 (i)

0.25% sodium chloride solution , 0.50% sodium chloride solution, 0.95% sodium chloride solution , 1.10% sodium chloride solution, hypertonic solution , hypotonic solution

KB0602

[ 3 marks ]

Total Marks

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9

2.

P UPSTREAM

Q OIL PALM FACTORY

R HOUSING AREA

FIGURE 2 The Department of Environment (DOE) has received complaints from the residents of a housing area concerning the activities of an oil palm factory which is believed to have contaminated a nearby river. Based on the above situation, as a representative of the DOE, you are required to plan a laboratory experiment to study the degreel of water pollution at three different locations along the river, as in Figure 2. The planning of the experiment should cover the following aspects: • Objective of study • Variables • Statement of hypothesis • List of apparatus and materials • Technique used • Experimental procedure • Presentation of results • Conclusion [ 15 marks ] END OF QUESTION PAPER 4551/3

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