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 student’s tests. test - tube reagent added to test-tube Biuret solution Benedict’s solution iodine solution X purple brick-red brown Y blue blue blue-black Z purple blue blue-black Which conclusion is consistent with the results? A Egg white and sucrose had been placed in tube X. B Maltose and starch had been placed in tube Z. C Maltose and sucrose had been placed in tube X. D Starch and sucrose had been placed in tube Y. 8 Four equal masses of different foods were burned as shown. The temperature of the water was measured before and after each food sample was burned. The results are shown in the table. Which food sample is likely to contain the most fats? water temperature at the start/°C water temperature at the end/° C A 16 37 B 17 95 C 18 87 D 19 22 thermometer burning food sample boiling tube water mounted needle www.KiasuExamPaper.com 467

5 9 The following is a list of laboratory steps. 1 add copper(II) sulfate drop by drop 2 shake well to mix 3 place in a boiling water-bath 4 add Benedict’s solution 5 add sodium hydroxide solution Arrange the steps in the order which they need to be carried ou t to show the presence of a protein. A 4 ĺ 1 ĺ 2 ĺ 3 B 4 ĺ 2 ĺ 3 C 5 ĺ 2 ĺ 1 ĺ 3 D 5 ĺ 2 ĺ 1 10A scientist investigated four species of insects. As all the in sects look physically familiar, he investigated the digestive enzymes found in their guts. From the data that he gathered, which insect feeds onlyon human blood? insect enzyme(s) present in insect guts amylase protease sucrase lipase A -- -+ B +- +- C -+ -+ D ++ + - key: + present; - absent 11Cubes of hard-boiled egg white are placed in test-tubes containi ng 5 cm3of water. Other substances are added to each tube as shown in the chart. The tubes were left for eight hours and then tested for amino acids. tube solution added results for amino acids 1 pepsin absent 2 pepsin + alkali absent 3 none absent 4 pepsin + acid large amounts 5b o i l e d p e p s i n + a c i dtraces 6 acid traces 7 alkali absent Which tubes show that pepsin is an enzyme? A 1 and 6 B 2 and 7 C 4 and 5 D 5 and 6 www.KiasuExamPaper.com 468

6 12The diagram shows the liver and its associated blood vessels. If a person is fasting, which blood vessel would have the highest concentration of glucose after 24 hours? 13Which row shows the most likely number of chloroplasts in three types of cell in a leaf? vascular bundle cell epidermal cell mesophyll cell A 15 8 8 B 81 5 8 C 08 1 5 D 00 1 5 14The diagram represents the gaseous exchange on the surface of a fish. Which conditions would result in the maximum rate of diffusion of oxygen across the gaseous exchange surface? amount of dissolved oxygen in water amount of dissolved oxygen in blood plasma rate of blood flow A large small fast B large small slow C small large fast D small large slow direction of water flow gaseous exchange surface blood capillary direction of blood flow www.KiasuExamPaper.com 469

7 15The diagram illustrates a simple potometer which measures water uptake in plants. Which combination of conditions would result in the fastest uptake of water? A bright light and humid air B bright light and high temperature C high humidity and high temperature D moving air and low temperature 16The diagram below shows the condition of a stoma at different times of the day. X Y Which of the following shows the most probable times at which the stoma is being observed? XY A 1.50 pm 9.30 am B 2.00 pm 7.30 pm C 10.00 pm 11.00 am D 11.30 pm 3.15 am 17An experiment was conducted on a young plant, using an aphid stylet (mouth part) to measure the rate of translocation. The same plant was then placed in a bell jar together with a chemical which absorbs oxygen. It was observed that the rate of translocation decreased and eventually stopped. Which of the following best explains the above observation? A Companion cells no longer produced sufficient energy. B Mitochondria in the xylem vessels ceased to function. C Photosynthesis could not occur in the plant placed in the bell jar. D Translocation occurred only by diffusion. leafy shoot water capillary tube water www.KiasuExamPaper.com 470

8 18The diagram shows someone blowing up a balloon. How do the proportions of gases in the air inside the balloon compare with the air outside the balloon? oxygen carbon dioxide water vapour A more less more B more less less C less more more D less more less 19The diagram shows a dialysis machine. Which process(es) does not happen along X? A active transport B diffusion C osmosis D osmosis and diffusion dialysis fluid out dialysis fluid in dialysis fluid blood X from patient to vein www.KiasuExamPaper.com 471

9 20The graph shows the effect of antidiuretic hormone (ADH) on the regulation of water content in blood plasma. Which part(s) of the graph reflect(s) the effect of increased ADH secretion? A M only B N only C M and P D N and O 21Which of the following statements about a voluntary actio