VJC 2021 H2 Bio 9744 P2 QP

1 VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2021 HIGHER 2 NAME : ……………………………………………………….………………. CT CLASS: ………………..……… BIOLOGY Paper 2 Structured Questions 9744/02 13/09/2021 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. 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 Total This document consists of 22 printed pages. [Turn over]

2 Answer all questions. 1 Cells in the pancreas secrete enzymes, such as amylase and trypsin, into a duct. The enzymes are packaged in vesicles so that they can be exported from these cells as shown in Fig. 1.1. Fig. 1.1 (a) Outline how the enzymes are packaged into vesicles and released to the outside of the cell. …………………………………………………………………………………….………………... ………………………………………………………………………………….…………………... …………………………………………………………………………………….………………... ………………………………………………………………………………….…………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... ………………………………………………………………………………………………….. [4]

3 (b) Explain how the structure of the vesicle shown in Fig. 1.1 allows it to serve its function. …………………………………………………………………………………….………………... ………………………………………………………………………………….…………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... ………………………………………………………………………………………………….. [3] (c) Researchers are interested in using the vesicles to deliver drugs to specific cells. Suggest and explain one modification to the vesicles to allow them to deliver the drugs to specific cells. …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... ………………………………………………………………………………………………….. [2] (d) Describe two differences between the release of enzymes shown in Fig . 1.1 and the release of flu viruses from the host cell. …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... …………………………………………………………………………………….………………... ………………………………………………………………………………………………….. [2] [Total: 11]

4 2 Fig. 2.1 shows the structure of a natural triglyceride. Fig. 2.1 (a) (i) On Fig. 2.1, circle