ASRJC 2023 JC2 H2 Biology Prelims Paper 2 (QP)

ASRJC BIOLOGY DEPT 9744/2023/J2PRELIM/P2 [Turn over H2 ANDERSON SERANGOON JUNIOR COLLEGE HIGHER 2 2023 JC2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS INDEX NUMBER BIOLOGY 9744/02 PAPER 2 SHORT STRUCTURED QUESTIONS Candidates answer on the Question Paper. No Additional Materials are required. 13 SEPTEMBER 2023 WEDNESDAY 2 HOURS READ THESE INSTRUCTIONS FIRST Write your name and class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graph. Do not use paper clips, highlighters, glue or correction fluid. Answer all questions. 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. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 32 printed pages. For Examiner’s Use 1 2 3 4 5 6 7 8 9 10 11 Total /100

2 ASRJC BIOLOGY DEPT 9744/2023/J2PRELIMS/P2 Answer all questions. 1 Archaea are single-celled micr oorganisms which inhabit extrem e environments, such as hot springs and volcanic vents at temperatures over 100 C. Fig. 1.1 shows the molecular structure of a phospholipid found in the cell membrane of an archaea and that of a eukaryote. Fig. 1.1 (a) (i) With reference to Fig. 1.1, state two structural differences between the two phospholipids. ……………………………………………………………………………………………….... ……………………………………………………………………………………………….... …………………………………………………… …………………………………………… …………………………………………………… …………………………………………… …………………………………………………… ………………………………………..[2]

3 ASRJC BIOLOGY DEPT 9744/2023/J2PRELIM/P2 [Turn over (ii) Explain why phospholipids are unable to provide structural support. ……………………………………………………………………………………………….... ……………………………………………………………………………………………….... ……………………………………………………………………………………………….... ……………………………………………………………………………………………….... …………………………………………………… …………………………………………… …………………………………………………… …………………………………………… ………………………………………………………………………………………………[3]

4 ASRJC BIOLOGY DEPT 9744/2023/J2PRELIMS/P2 (b) In an experiment to investigate the transport of ions i