YIJC 2023 H2 9744 P3 QP

1 @YIJC 9744/03/PE/2023 [Turn Over YISHUN INNOVA JUNIOR COLLEGE JC2 PRELIMINARY EXAM Higher 2 NAME INDEX NO CG BIOLOGY Paper 3 Long Structured and Free-Response Questions Candidates answer on the Question Paper. No Additional Materials are required. 9744/03 15 September 2023 2 hours READ THESE INSTRUCTIONS FIRST Write your name and class in the spaces at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid/tape. Section A Answer all questions in the spaces provided on the Question Paper. Section B Answer any one question in the spaces provided on the Question Paper. Indicate the question you have attempted at the top of page 15. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. The number of marks is given in brackets [ ] at the end of each question or part question. Overall Results for H2 Biology Preliminary Examination Paper Raw Marks Weighting (%) Weighted score Grade 1 30 15 100 2 100 30 100 3 75 35 100 4 55 20 100 This document consists of 19 printed pages and 1 blank page. For Examiner’s Use Section A 1 30 2 10 3 10 Section B 4 or 5 25 Total 75

2 @YIJC 9744/03/PE/2023 [Turn Over Section A Answer all questions in this section. 1 (a) Table 1.1 shows the incidence rates per 100 000 women for tuberculosis and breast cancer in Sweden from 2010 to 2020. Table 1.1 year incidence rate per 100 000 women per year breast cancer tuberculosis 2010 149 7.2 2012 157 6.6 2014 175 5.8 2016 179 5.1 2018 184 4.9 2020 188 3.5 Medical treatment, preventative measures, diet and lifestyle have changed over this time period and may account for the trends shown in Table 1.1. (i) With reference to Table 1.1 and the information provided, suggest and explain a hypothesis that may account for the trends of each of the diseases shown in Table 1.1. breast cancer tuberculosis [4]

3 @YIJC 9744/03/PE/2023 [Turn Over [BLANK PAGE]

4 @YIJC 9744/03/PE/2023 [Turn Over (ii) Explain why tuberculosis is considered an infectious disease while breast cancer is not. [2] Epidemiological studies suggest that the incidence of cancer is associated with type 2 diabetes. Type 2 diabetes is a form of diabetes that is characterised by high blood sugar levels and insulin resistance, whereby cells do not respond properly to insulin . Type 2 diabetes is thought to be attributed to lifestyle factors. One study in Sweden investigates the incidence rates of