Zhonghua 2019 Bio Prelim P1 QP

ZHONGHUA SECONDARY SCHOOL PRELIMINARY EXAMINATION 2019 SECONDARY 4E Candidate’s Name Class Register Number 4E4 BIOLOGY 6093 /01 20 September 2019 1 hour Additional Materials: OTAS READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, index number and class on the OTAS in the spaces provided. There are fortyquestions on this paper. Answer all questions. For each question there are four possible answers A,B,Cand D. Choose the one you consider correct and record your choice in soft pencil on the separate OTAS. 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. Total 40 Setter: Ms Rozianna Vetter: Mr Goh Tze Mian This document consists of 20printed pages, including this cover page. www.KiasuExamPaper.com 528

2 Section A Answer allquestions in the OTAS. 1 The diagram shows a typical animal cell with cell components involved in the synthesis and secretions of an enzyme. Which is the correct route taken by an amino acid molecule during enzyme production? A 2Æ3Æ4Æ1 B 2Æ4Æ3Æ1 C 3Æ2Æ1Æ4 D 3Æ4Æ2Æ1 2 The diagram shows a freshwater single-celled organism. Which of the statements correctly identifies structures 1 to 4 and its function? 1 smooth endoplasmic reticulum synthesises fats and steroids 2 chromosomes control polypeptide synthesis 3 Golgi body synthesizes proteins 4 chloroplast captures light energy for photosynthesis A 1, 2, 3 and 4 B 1, 3 and 4 C 2o n l y D 2 and 3 g g 1 2 3 4 www.KiasuExamPaper.com 529

3 3 Concentrated starch solution is added into a cow’s urinary bladder until it is half full. The bladder is tied, weighed and then placed in a dilute starch solution. The weight of the urinary bladder is taken every hour. Which graph best reflects these results? 4 The diagram shows a xerophytic leaf in different conditions, Pand Q. X X condition P condition Q Which statements about the cells of the leaf in conditions Pand Qare correct? 1w a t e r p o t e n t i a l i n c o n d i t i o n Pis higher than in condition Q 2 cells may be turgid in condition Pand plasmolysed in condition Q 3 turgidity of cells in condition Pis lesser than in condition Q 4 no net diffusion of water into cells in layer Xin either condition Por Q A 1 and 4 B 2 and 3 C 1, 2 and 4 D 1, 2, 3 and 4 A B C D www.KiasuExamPaper.com 530

4 5 Five disaccharides were each hydrolysed with dilute acid and the purified products were separated by chromatography. The results are shown below. 12 34 5 The spots from 1 represent the products obtained from the hydrolysis of sucrose. Which represents the results obtained