9700_w08_qp_5 - UNIVERSITY OF CAMBRIDGE INTERNATIONAL...

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For Examiner’s Use 1 2 3 Total This document consists of 8 printed pages and 4 blank pages. SPA (FF/CG) T52857/4 © UCLES 2008 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. *9930029840* BIOLOGY 9700/05 Paper 5 Planning, Analysis and Evaluation October/November 2008 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required.
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2 9700/05/O/N/08 © UCLES 2008 For Examiner’s Use 1 Fig. 1.1 shows an experimental set up used by a student to test the antibiotic penicillin on a range of different bacteria. well containing antibiotic bacteria growing in nutrient agar area of inhibition (clear zone) Fig. 1.1 Pure cultures of different types of bacteria were mixed with nutrient agar and poured into Petri dishes. Once the agar was set, a well was cut in the agar in the centre of each Petri dish, using a cork borer. Different concentrations of penicillin were added to the wells. After incubation for 24 hours at 20°C the size of the zone of inhibition was measured.
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