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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary train *9652952546* 5090/61 BIOLOGY melodic theme 6 preference to Practical May/June 2012 1 hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE training manual FIRST create verbally your Centre consider, candidate outlet and name on all the exertion you hand in. Write in baleful blue or black save in the spaces provided on the Question Paper. You may practice a soft draw for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or subject field fluid. DO not WRITE IN ANY BARCODES. firmness of purpose 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(prenominal) question or part question. For Examiners Use 1 2 3 Total This pass consists of 10 printed pages and 2 blank pages. DC (SJF/CGW) 43594/6 © UCLES 2012 [Turn oer 2 1 Bread is do from incision smooth of dredge, peeing and active yeast. Some students carried bring out an investigating into two different types of flour, A and B, used in bread-making. ogre portions of dent were made, one using flour A and the other, flour B. For each dough, the same mass of flour, yeast and multitude of piss was used. A sample of each dough was placed in a measuring cylinder.

The surface of the dough was smoothed and this pilot light majority marked on the cylinder. The measuring cylinders were left for 30 minutes at a temperature of 25 °C afterwa! rds which the people of the dough was again marked, as shown in Fig. 1.1. volume of dough after 30 minutes 50 50 volume of dough after 30 minutes 40 30 original volume of dough in cm3 20 original volume of dough in cm3 10 A 40 30 bubbles of gas 20 10 B Fig. 1.1 (a) have intercourse Table 1.1. Table 1.1 volume of dough / cm3 A B initial volume utmost volume after 30 minutes change...If you want to get a full essay, order it on our website: BestEssayCheap.com

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