9700_w02_qp_4

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Unformatted text preview: This question paper consists of 12 printed pages. SP (SM/SLC) S29591/4 © CIE 2002 [Turn over CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level BIOLOGY 9700/4 PAPER 4 OCTOBER/NOVEMBER SESSION 2002 1 hour Candidates answer on the question paper. No additional materials are required. TIME 1 hour INSTRUCTIONS TO CANDIDATES Write your name, Centre number and candidate number in the spaces at the top of this page. Answer all questions. Write your answers in the spaces provided on the question paper. All working for numerical answers must be shown. INFORMATION FOR CANDIDATES The intended number of marks is given in brackets [ ] at the end of each question or part question. Candidate Centre Number Number Candidate Name FOR EXAMINER’S USE TOTAL 1 2 3 4 5 2 9700/4/O/N/02 Answer all the questions. Write your answers in the spaces provided. 1 Fig. 1.1 shows the changes in concentration of a 3C compound, glycerate phosphate, GP, and a 5C compound, ribulose bisphosphate, RuBP, extracted from samples taken from actively photosynthesising green algae in an experimental chamber when the light source was turned off. Fig. 1.1 (a) With reference to Fig. 1.1, describe what happens after the light source was turned off to the concentration of (i) GP; ................................................................................................................................... ................................................................................................................................... ...............................................................................................................................[2] (ii) RuBP. ................................................................................................................................... ...............................................................................................................................[1] concentrations of GP and RuBP GP RuBP time light turned off light dark For Examiner’s Use 3 9700/4/O/N/02 [Turn over (b) Explain, with reference to the Calvin cycle, the reasons for these observed changes in (i) GP; ................................................................................................................................... ................................................................................................................................... ...............................................................................................................................[2] (ii) RuBP. ......................................................................................................................................
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This note was uploaded on 01/25/2012 for the course BIO alevels taught by Professor J.b during the Spring '11 term at Taylor's.

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9700_w02_qp_4 - This question paper consists of 12 printed...

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