West Spring 2018 Bio Prelim P1 QP

West Spring Secondary School PRELIMINARY EXAMINATION 2018 BIOLOGY 6093/01 SECONDARY 4E x p r e s s Name ( ) Date 03 Sep 2018 Class Duration1h o u r Additional Materials:1 OTAS READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper-clips, highlighters, glue or correction fluid. Write your name and index number on the Answer Sheet in the spaces provided. There arefortyquestions on this paper. Answer allquestions. For each question there are four possible answers A, B, C and D. Choose the oneyou consider correct and record your choice in soft pencilon the separate answer sheet. 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. The use of approved scientific calculators is allowed for this paper. This document consists of 15printed pages including the cover page. Setter(s) Ms Zhou Siyang [Turn over www.KiasuExamPaper.com 464

2 1 Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in the very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms? A They do not need oxygen. B They do not contain chloroplasts C They do not contain mitochondria. D Their enzymes are easily denatured by heat. 2 What are the similarities between a neurone and a sieve tube element in phloem? 1 Both lack nuclei. 2 Both are living cells. 3 Both are specialised cells. 4 Both have large surface areas to volume ratio. A 3 only B 1 and 4 only C 2 and 3 only D 1, 2 and 3 only 3 The diagram shows a typical animal cell with cell components that are involved in the synthesis and secretion of an enzyme. Which of the following identifies correctly the route taken by an amino acid molecule from the point it is synthesised and as it passes through these cell components? A 2 ĺ 4 ĺ 1 ĺ 3 B 2 ĺ 1 ĺ 4 ĺ 3 C 3 ĺ 2 ĺ 1 ĺ 4 D 3 ĺ 4 ĺ 1 ĺ 2 1 2 3 4 www.KiasuExamPaper.com 465

3 4 Which diagram illustrates the process of active transport? 5 Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment? A B C D A B C D www.KiasuExamPaper.com 466

4 6 In lactose intolerance, insufficient lactase is produced to digest lactose into molecules small enough to be absorbed by the small intestine. The lactose remains in the lumen of the small intestine and the contents of the small intestine become more hypertonic than usual. Which of the following would be a consequence of this? A More water will be absorbed by the walls of the small intestine. B Less lactose will remain in the lumen of the small intestine. C The intestinal contents become very dry. D The intestinal contents will contain more water. 7 A student was asked to identify the two food substances in each of three test-tubes. The table shows the results of the stud