2020 EJC Promo JC1 P2 Bio (Q)

©EJC 2020 9744/02/J1H2PROMO/2020 [Turn over EUNOIA JUNIOR COLLEGE JC1 Promotional Examinations 2020 General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CIVICS GROUP 2 0 - REGISTRATION NUMBER H2 Biology Paper 2 Structured Questions & Free Response Questions 9744/02 02 October 2020 2 hours Candidates are to answer questions in Section A in this question booklet. Candidates are to answer questions in Section B in the answer booklet provided. Additional Materials: 8-page Answer Booklet READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. There are two sections in this paper, Section A and Section B. You are advised to plan your time appropriately to complete both Sections. Answer all questions. 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 paper clips, highlighters, glue, or correction tape/fluid. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 15 printed pages and 1 blank page. For Examiner’s Use 1 2 3 4 5 6 7 8 Total 80

2 ©EJC 2020 9744/02/J1H2PROMO/2020 For Examiner’s Use BLANK PAGE

3 ©EJC 2020 9744/02/J1H2PROMO/2020 [Turn over] For Examiner’s Use Section A Answer all the questions in this section. 1 Emperor penguins are the only species of penguin that breed during the Antarctic winter and they may stand still for multiple days to incubate their eggs. In order t o survive in freezing temperatures, the feet of emperor penguins contain a high percentage of unsaturated fats. (a) Explain the significance of unsaturated fatty acids in cell membranes. ……………………………………………………………………………………………….……………… ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….…............. [2] (b) Fig. 1.1 shows the structure of a lipoprotein in the blood of emperor penguins. Lipoproteins transport fats from the liver to other tissues via the bloodstream. The membrane proteins of lipoproteins allow for fats to be deposited to the target tissue. Fig. 1.1 With reference to Fig 1.1, describe how the structure of lipoproteins allow s for fats to be transported from the liver to a specific tissue via the bloodstream. ……………………………………………………………………………………………….……………… ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….….................. ……………………………………………………………………………………………….…............. [3]