2024 VJC H2 Bio P2 QP

1 VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2024 HIGHER 2 NAME : ……………………………………………………….………………. CT CLASS: ………………...……… BIOLOGY Paper 2 Structured Questions 9744 / 02 11/09/2024 2 hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name and CT class in the spaces at the top of this page. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions 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. The number of marks is given in bracket [ ] at the end of each question or part question. Question Marks 1 2 3 4 5 6 7 8 9 10 11 Total This document consists of 31 printed pages. [Turn over]

2 Answer all questions. 1 Amoeba is a single-celled organism of the kingdom Protista. Am oeba gets its nutrients in a heterotrophic manner, taking in food from its surroundings. Fig. 1.1 shows the electron micrograph of an amoeba. Fig. 1.1 (a) With reference to Fig. 1.1 and the information provided, (i) identify structure X and Y and state a structural difference between them. …………………………………………………………………………………………………... …………………………………………………………………………………………………... …………………………………………………………………………………………………... ……………………………………………………………………………………………..… [2]

3 (ii) explain the importance of structure X to the amoeba. …………………………………………………………………………………………………... …………………………………………………………………………………………………... …………………………………………………………………………………………………... …………………………………………………………………………………………………... …………………………………………………………………………………………………... ……………………………………………………………………………………………..… [3] (b) Marseillevirus is a virus that infects amoeba. It is taken up by amoeba via phagocytosis. Upon membrane fusion, new progeny viruses are formed through DN A replication and protein synthesis. The progeny viruses are then released as the amoeba is lysed. Fig. 1.2 shows the structure of Marseillevirus. Fig. 1.2 With reference to Fig. 1.2 and the information provided, explai n how Marseillevirus challenges the cell theory. ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. …………………………………………………………………………………………………… [3] [Total: 8]

4 2 Some structural features of phospholipids are listed in Table 2.1. Table 2.1 features affect role in cell surface membrane synthesised by condensation hydrophob