2024 ASRJC JC2 H2 Biology Prelims P3 (Ans)

ASRJC BIOLOGY DEPT 9744//2024/J2PRELIM/P3 [Turn over H2 ANDERSON SERANGOON JUNIOR COLLEGE HIGHER 2 ANSWERS 2024 JC2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS INDEX NUMBER BIOLOGY 9744/03 PAPER 3 LONG STRUCTURED AND FREE RESPONSE QUESTIONS Candidates answer on the Question Paper. No Additional Materials are required. 10 SEPTEMBER 2024 TUESDAY 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. 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. 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 13 printed pages and 1 blank page For Examiner’s Use 1 / 30 2 / 10 3 / 10 4 / 5 / 25 Total / 75

2 ASRJC BIOLOGY DEPT 9744//2024/J2PRELIM/P3 Section A Answer all the questions in this section. 1 Malaria is a disease caused by the Plasmodium parasite. There are four species of the Plasmodium parasite, of which Plasmodium falciparum is responsible for most of the deaths from this disease. Fig. 1.1 shows part of the life cycle of P. falciparum, which requires two hosts. A female mosquito carrying P. falciparum injects the parasite, in a form known as a sporozoite, into the bloodstream of an uninfected person. The P. falciparum parasite multiplies in a liver cell before emerging as a different form, known as a merozoite, wrapped in the liver cell surface membrane. It enters a red blood cell and multiplies before causing the rupture of the red blood cell, releasing more parasites. Fig. 1.1 A. B.

3 ASRJC BIOLOGY DEPT 9744//2024/J2PRELIM/P3 [Turn over (a) State two features, visible in Fig. 1.1B, that indicate that P. falciparum is eukaryotic. 1. Presence of membrane bound organelle / compartmentalisation via membranes Named example 2. Presence of nucleus / nuclear envelope 3. Presence of (membrane bound) food va