Zhonghua 2019 Bio Prelim P1+2 MS

ZHONGHUA SECONDARY SCHOOL 2019 PRELIMINARY EXAMINATION Secondary 4E Biology 1 PAPER 1 MULTIPLE-CHOICE QUESTIONS [40 MARKS] 1. B 6. A 11. B 16. B 21. D 26. A 31. B 36. A 2. C 7. A 12. B 17. A 22. D 27. C 32. A 37. D 3. B 8. B 13. B 18. C 23. D 28. D 33. B 38. C 4. C 9. A 14. A 19. D 24. D 29. C 34. B 39. D 5. A 10. C 15. B 20. B 25. C 30. B 35. C 40. A PAPER 2 SECTION A STRUCTURED QUESTIONS [50 MARKS] Qn Marking Point Mark 1a For an X at the point where graph for shade leaf intersects x axis 1 1b The shade leaf did not produce or uptake CO2at a higher light intensity than the sun leaf OR Higher rate of photosynthesis / CO2uptake in the sun leaf than the shade leaf at higher light intensity The rate of photosynthesis increases more rapidly / (at a faster rate) in the sun leaf CO2uptake is greater in the shade leaf at low light intensity More respiration occurred in the sun leaf at lower light intensity CO2uptake levels off in the shade leaf 1 1 1 1 Any 2 1c The increase in temperature increases the rate of enzyme- cont rolled reactions involved in photosynthesis / more successful collisions in the chloroplast so there is more chemical reaction taking place Increasing temperature will increase the rate of photosynthesis And carbon dioxide uptake increases 1 1 1 1d Immerse aquatic plant in five different concentrations of sodium hydrogencarbonate solutions Fixed light intensity / similar plant size and type Count number of (oxygen) bubbles released by leaf in five minutes 1 1 1 2a Heart rate = 60 / 0.8 = 75 bpm 1 2bi H 1 2bii D 1 2c Muscles in ventricular wall contract at A leading to increased pressure in ventricles Causing semi-lunar valves to open Blood then rushes from ventricles to aorta / pulmonary artery 1 1 1 2d Low oxygen content in blood due to mixing of oxygenated and deoxygenated blood 1 Theinnnnnnnnnncreaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasessssssssssssssssssssssssssssssssssssss i n teteeeeeeeeeeeeempmppmppmpmppmpppppppppmpmpppppppppppppppppppppppppppererrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrataaaaaure inininininnnininnininininininininnnncrcrrcrrrrcrccrcrcrcrcrrrrrcrrrccrcrcrcrrcccccrcrcrcrcrcccccrcrcrcccccrccceaeaeaeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeeeeeeeeeeesesesesesssessesesesesesessesesesesessesseseseseseseeseseseseeseseseesesesesesseeseesessssssssssssssssssssssssssssssssssssssssssthththththththhththththhththththththhhhhhhhhhhhhhe e eeeee eeee eeeeeeeee eeeeeeeeeeeeee rrarrrrrrrrrteooof f f enenenenenenzyzyzyzyzyzyzme - volvvvvvvvvvvvvvvedededededddededededededdddedediin nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnppphpppppppppppppppppppppppppppotosssssynynynynynynnynyynnynynynnyyyyyyththtttttttttttteseseseseseseseesseesesesesseesesesesseseesseeseeessesseseseeseseseeseesseeeee isi / moooooooooooooooorerererererererererrererereeeeeereerereeeeesssssssssssssssssssssssssssssssssssssssssucucucuuuucucucuuuuuucuuucucuuucuuuuuuuucuuuuuuuuucececcececececeeccecececececececececeecececccecececcccececececcccecceeecccceecceeeeceeeeceecs