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Kampala Wakiso Giant Schools Assoclation National Adavanced Certificate Of Education Biology Theory Paper Two Mocks

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KWGSA Joint Mock Examinations 2025 Page 1 of 3 P530/2 BIOLOGY Paper 2 05th Aug 2025 3 Hours KAMPALA WAKISO GIANT SCHOOLS’ ASSOCIATION (KWGSA) National Joint Mock Examination 20 25 Uganda Advanced Certificate of Education BIOLOGY THEORY Paper 2 3 Hours INSTRUCTIONS TO CANDIDATES This paper consists of two sections A and B Answer all questions in section A and any three questions in Section B All questions in section B carry equal marks KWGSA Joint Mock Examinations 2025 Page 2 of 3 SECTION A (40 MARKS) Answer all questions in this section 1. An investigation was made to determine the effect of carbon monoxide concentration and light intensity on the productivity of a plant in a green house. The productivity was determined by measuring the rate of of carbon dioxide fixation in milligrams per dm2 leaf area, per hour. The investigation was conducted at three different light intensities; 0.05, 0.25 and 0.80 (arbitrary units), the highest approximating to full light. Aconstant temperature of 220C was maintained throughout. The results are indicated in Table 1 Carbon dioxide concentration (Ppm) Productivity at different light intensities (mg dm-2n-1) At 0.05 units light intensity At 0.25 units light intensity At 0.08 units light intensity 300 12 25 27 500 14 30 36 700 15 35 42 900 15 37 46 1100 15 37 47 1300 12 31 46 (a) Using the same axes, graphically represent the information in Table 1 . (b) For the experiment at 0.25 units light intensity (i) What is the effect of increasing carbon dioxide concentration on the productivity of the plant? (ii) Explain the effect of increasing carbon dioxide concentration on the productivity of the plant. (c) (i) Corbon dioxide concentration of 300 ppm is equivalent to that of the atmosphere. For each of the three light intensities, …
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Kampala Wakiso Giant Schools Assoclation National Adavanced Certificate Of Education Biology Theory Paper Two Mocks, is an educational document on StudyUganda.com. This resource includes: "KWGSA Joint Mock Examinations 2025 Page 1 of 3 P530/2 BIOLOGY Paper 2 05th Aug 2025 3 Hours KAMPALA WAKISO GIANT SCHOOLS’ ASSOCIATION (KWGSA) National ……" (Format: PDF) — 130.29 KB, 3 pages. Added July 23, 2026.

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