2010 pspm kedah biology 123 w ans

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    PEPERIKSAAN PERCUBAAN SPM 2010 4551/1

    Peraturan Pemarkahan( Jawapan )

    BIOLOGYPaper 1

    29 Ogos 2010

    1

    4

    1jam

    PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA

    SEKOLAH MENENGAH

    NEGERI KEDAH DARULAMAN

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    MARKING SCHEME

    PAPER 1

    TRIAL KEDAH 2010

    1. C 26. A

    2. A 27. A

    3. C 28. B

    4. D 29. C

    5. C 30. C

    6. B 31. C

    7. A 32. B

    8. D 33. A

    9. D 34. C10. B 35. D

    11. C 36. A

    12. D 37. A

    13. D 38. A

    14. D 39. D

    15. B 40. A

    16. D 41. A

    17. C 42. C

    18. A 43. B19. D 44. B

    20. C 45. A

    21. B 46. B

    22. D 47 D

    23. A 48. A

    24. B 49. C

    25. C 50. B

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    PEPERIKSAAN PERCUBAAN SPM 2010

    BIOLOGY

    PAPER 2

    Two hours and thirty minutes

    Peraturan Pemarkahan

    ( Jawapan )

    4551/2

    Biology

    Kertas 2

    29 Ogos 2010

    2

    12 hours

    PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA

    SEKOLAH MENENGAH

    NEGERI KEDAH DARUL AMAN

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    2

    BIOLOGY

    SECTION A

    PAPER 2 [4551/2]

    No. Marking Criteria / Sample Answers Marks

    1 (a) (i) Gills 1

    (ii) Tracheal system 1

    (b) P : Filaments

    Q: Spiracles

    1

    1 2

    (c) (R is ring of chitin which) support the tracheal / prevent the tracheal

    from collapsing.

    1

    (d) Diagram 1.1(b):

    P1: The filament have numerous thin-walled lamellae to maximise

    the surface area for gaseous exchange.

    P2: The gill filaments have thin membrane and covered by a net

    work of capillaries to transport respiratory gases.

    P3: The surface of the gills is moist which allows the gases to be

    dissolved.

    Any 1P 1

    Diagram 1.2(b)

    P1: The large number of tracheoles provides a large surface for the

    diffusion of gases.P2: Tip of tracheoles have thin permeable walls and contain fluid in

    which respiratory gases can dissolve.

    P3:Terminal ends of the tracheol remains moist which allows the

    gases to be dissolved.

    Any 1P

    1

    (e) (i) P1:( The gaseous exchange process occurs over the whole body

    surface in an Amoeba sp) through simple diffusion.

    P2:Higher concentration of oxygen in the water surrounding causes

    oxygen to diffuse into the Amoeba.

    P3:Higher concentration of carbon dioxide in the cell causes carbondioxide to diffuse out of the Amoeba.

    Any 2P

    1

    1

    1

    2

    (ii) S: Contractile vacuole 1

    (iii) P1: Freshwater is hypotonic to the cytoplasmic fluid of Amoeba sp .

    P2: Water diffuses into the cell and fill the contractile vacuole by

    osmosis

    P3: When the contractile vacuole is filled with water to its maximum

    size, it contracts to expel its content from time to time.

    Any 2P

    1

    1

    1

    2

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    3

    No. Marking criteria/ Sample answers Mark

    2 (a) (i) Osmosis 1

    (ii) P1 : Sucrose solution is hypertonic / more concentrated.

    P2 : Water diffuse from distilled water into the sucrose solutionP3 : The level of sucrose solution in the capillary tube stop rising

    at the equilibrium stage / the concentration inside and outside

    of the visking tubing is the same / the amount of water

    diffuse into and out from the visking tubing is the same.

    Any 2 Ps

    1

    11 2

    (b) F- Sucrose molecules are too large

    E- The visking tubing is a semi permeable membrane/

    which only allows certain substances to pass through.

    1

    1 2

    (c) (i) Y : crenation

    Z : haemolysis

    1

    1 2

    (ii) P1- Solution Z is hypotonic compare to red blood cell.

    P2- Osmosis occur

    P3- water leaves/ diffuses into the cell

    P4- Red blood cell expand/ swell and burst.

    Any 3P

    1

    1

    1

    1

    3

    (iii) F : No

    P1 : Plant cell consists of cell wallP2 : Cell wall is made up of cellulose

    // Cell wall able to withstand the pressure.

    Any 2

    1

    11 2

    Total 12

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    4

    No. Marking criteria/ Sample answers Mark

    3 (a) (i) Absorption / Simple diffusion / facilitated diffusion 1

    (ii) F1 thin wall/ one cell thick

    E1 increase rate of diffusion of digested food/ nutrients

    F2 large surface area/ has microvilli

    E2 increase rate of absorption of digested food/ nutrient

    F3 has a network of capillaries/ b