2022 HCI JC2 H2 Biology Prelims Paper 2 QP

This document consists of 30 printed pages. © Hwa Chong Institution 2022 9744 H2 Biology / JC2 Preliminary Examinations / Paper 2 HWA CHONG INSTITUTION JC2 Preliminary Examinations Higher 2 CANDIDATE NAME CT GROUP 21S7__ CENTRE NUMBER INDEX NUMBER BIOLOGY Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 9744/02 22 August 2022 2 hours INSTRUCTIONS TO CANDIDATES Write your name, CT group, Centre number and index number in the spaces provided at the top of this cover page. There are eleven questions. Answer all questions in the spaces provided on the Question Paper. INFORMATION FOR CANDIDATES 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. You are reminded of the need for good English and clear presentation in your answers. For Examiners' Use 1 / 9 2 / 9 3 / 11 4 / 9 5 / 10 6 / 10 7 / 11 8 / 11 9 / 9 10 / 5 11 / 6 Total / 100

2 © Hwa Chong Institution 2022 9744 H2 Biology / JC2 Preliminary Examinations / Paper 2 QUESTION 1 Fig. 1.1 shows the structure of amylose, a component of the polymer starch. Fig. 1.1 (a) Describe the main features of amylose visible in Fig. 1.1. ………………………………………...………………………..……………..…………..……… ……………………………………………………………………………………………..……… ……………………………………………………………………………………………..……… …………………………………………………………………………………………………..… …………………………………………………………………………………………..……. [2] (b) Explain how the structure of amylose makes it suitable for its function. ………………………………………...………………………..……………..…………..……… ……………………………………………………………………………………………..……… ……………………………………………………………………………………………..……… …………………………………………………………………………………………………..… …………………………………………………………………………………………..……. [2]

3 © Hwa Chong Institution 2022 9744 H2 Biology / JC2 Preliminary Examinations / Paper 2 Single-stranded amylose in an aqueous solution gradually forms a double helix. (c) Suggest how the double helix structure of amylose is formed. ……………………………………………………………………………………………..……… …………………………………………………………………………………………………..… …………………………………………………………………………………………..……. [1] Collagen is another polymer that can be found in living organisms. (d) (i) State two ways in which the structure of collagen differs from the structure of starch. ……………………………………………………………………………………………..…… …………………………………………………………………………………..……………… …………………………………………………………………………………..……………… ………………………………………………………………………………………………….. …………………………………………………………………………………………..…. [2] (d) (ii) Explain how one of the differences stated in (d)(i) allows coll