2015 RI H2 Biology Prelims Paper 1 Questions

© RI 2015 Preliminary Examination 9648/01 [Turn over RAFFLES INSTITUTION 2015 Year 6 Preliminary Examination Higher 2 BIOLOGY 9648/01 Paper 1 Multiple Choice 29 September 2015 1 hour 15 min Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name and shade your Index Number on the Answer Sheet in the spaces provided. There are forty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Calculators may be used. (Erase all mistakes completely. Do not bend or fold the Answer Sheet). This document consists of 24 printed pages. Raffles Institution Internal Examination

2 © RI 2015 Preliminary Examination 9648/01 1 A sample of yeast cells was grown in a culture. Radioactive amino acids were added to the solution in which they were being grown. At various times, samples of the cells were taken and the amount of radioactivity in different organelles was measured. The results are shown in the table. Time after radioactive amino acids were added to the solution / min Amount of radioactivity present / arbitrary units P Q R 1 21 120 6 20 42 68 6 40 86 39 8 60 76 28 15 90 50 27 28 120 38 26 56 Which best describes the identities of organelles P, Q and R? P Q R A Golgi apparatus Rough endoplasmic reticulum Secretory vesicles B Rough endoplasmic reticulum Smooth endoplasmic reticulum Golgi apparatus C Nucleus Rough endoplasmic reticulum Golgi apparatus D Smooth endoplasmic reticulum Golgi apparatus Secretory vesicles 2 The key below can be used to identify carbohydrates. (1) Sugars……………………………………… go to (2) Polysaccharides ……………………..…… go to (4) (2) Monosaccharides ..……..…………………. A Disaccharides ……………………………... go to (3) (3) Contains only 1 type of monomer……….. B Contains only 2 types of monomer…....… sucrose (4) Structural function…………………………. go to (5) Storage function ……….………………….. go to (6) (5) Structural function in plants..….………….. C Structural function in animals..….……...... collagen (6) Storage function in plants..….……………. starch Storage function in animals..….….………. D Which of the above is maltose?

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