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Nelson Mandela Secondary School Masaka End Of Term I Examinations 2025 Senior Five Five Biology

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©2025 Biology Department of Nelson Mandela (NELMAN) S.S - 0776430937 Page 1 NELSON MANDELA SECONDARY SCHOOL – MASAKA END OF TERM I EXAMINATIONS 2025 S.5 BIOLOGY 2HOURS: 30MINUTES Instructions  The paper consists of two examination items .  Attempt both the items on the answer booklet given.  Response to each item must be shown on separate pages . Item 1 On scientific investigation and analysis, it was found out that conjugated lipids are associated with less heart problems than the simple lipids. Due to the fact that there was little technica l knowledge to prove whether a given fatty food product contains conjugated or simple lipids, the ministry of health announced a total ban on any industrial food product that contains fats. However, the ministry supported food industries to produce more carbohydrate foods. Two food samples X and Y from different industries were brought to the Uganda National Bureau of Standards ( UNBS) for analysis and approval . Since simple laboratory methods of using reagents like benedict’s and iodine solution s were i nappropriate, the best method adopted was to subject each of the food samples to combustion so that the food sample th at yields t he heat energy greater than 30KJ was to be banned while the one that yields less than this was to be approved. On c omplete combustion, product sample X heated 250cm3 of water from 24.5oC to 68oC while Sample Y heated the same amount of water at 68oC to 89.5oC. (It is given that the Specific Heat Capacit y and density of water are 4.2Jg-1oC-1 and 1gcm-3 respectively.) Task a) i) With exa mples, distinguish between the two types of lipids talked about in the scenario. 3scores ii) Using the named examples, outline the role played by lipids in the lif …
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Nelson Mandela Secondary School Masaka End Of Term I Examinations 2025 Senior Five Five Biology, is an educational document on StudyUganda.com. This resource includes: "©2025 Biology Department of Nelson Mandela (NELMAN) S.S - 0776430937 Page 1 NELSON MANDELA SECONDARY SCHOOL – MASAKA END OF TERM I EXAMINATIONS 2025 S.5 ……" (Format: PDF) — 513.76 KB, 2 pages. Added July 23, 2026.

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