gce winter 2010 - question paper - KCSE Online

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8 Examiner only 4. The graph shows the relationship between the rate of photosynthesis and carbon dioxide concentration in the green plant Hormidium at different light intensities and temperatures. 6 kilolux 20˚C A Rate of photosynthesis /arbitrary units 6 kilolux 14˚C 2 kilolux 20˚C B C 0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 Carbon dioxide concentration / % (a) (i) Explain the shape of the curve A. [2] ......................................................................................................................................................................................................... ......................................................................................................................................................................................................... ......................................................................................................................................................................................................... ......................................................................................................................................................................................................... (ii) Explain why there is a difference between graphs. [2] A and B .................................................................................................................................................................. ............................................................................................................................................................................................ A and C .................................................................................................................................................................. ............................................................................................................................................................................................ (314-01)
9 Examiner only (iii) Draw a line on the graph to indicate the rate of photosynthesis at 2 kilolux and 14 °C. [1] (b) What would be the effect of depriving the plant of nitrogen and magnesium? [3] ........................................................................................................................................................................................................................ ........................................................................................................................................................................................................................ ........................................................................................................................................................................................................................ ........................................................................................................................................................................................................................ (Total 8 marks) (314-01) Turn over.
Page 1 and 2: Candidate Name Centre Number 2 Cand
Page 3 and 4: 3 Examiner only (b) NAD is a compou
Page 5 and 6: 5 Examiner only 3. The following di
Page 7: 7 Examiner only (iii) Draw the resu
Page 11 and 12: 11 Examiner only (c) Suggest an exp
Page 13 and 14: 13 Examiner only (iv) Using the inf
Page 15 and 16: 15 Examiner only ..................

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