BPGHS 2018 Bio Prelim P1 QP

Name of Candidate: _____________________ ( ) Class: _________ Calculator Model: This paper consists of 17 printed pages. BUKIT PANJANG GOVERNMENT HIGH SCHOOL Preliminary Examination 2018 SECONDARY 4 Express BIOLOGY Paper 1 6093/01 Date: 17August, 2018 Duration: 1h r Time: 0745 – 0845 hr READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on this question paper and the Optical Answer Sheet. There are forty questions on 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 a soft 2B pencil on 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 question paper. The use of an approved scientific calculator is expected, where appropriate. [Turn over For Examiner’s Use Total /40 www.KiasuExamPaper.com 58

2 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 1 The table shows some of the structural features present or absent in four different types of cell types. Which row correctly identifies cell types P to S? cell P cell Q cell R cell S A guard cell red blood cellroot hair cellxylem vessel Bred blood cell guard cell xylem vesselroot hair cell C root hair cellxylem vesselred blood cell guard cell D xylem vesselroot hair cell guard cell red blood cell 2 The figure below shows a cell. Which of the following features in the cell shown suggest that it is an animal cell? (i) It has a cell wall to p rovide mechanical support. (ii) It has a flagellum to help in locomotion. (iii) It has mitochondria for the release of energy. (iv) It has a nucleus to contro l all its cellular activities. A (i) and (ii) B (ii) only C (iii) and (iv) C (iv) only www.KiasuExamPaper.com 59

3 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 3 Excess sugars formed by photosynthesis may be converted into other carbohydrates. Which of the following is correct? storage carbohydratestructural carbohydrate A cellulose starch B glucose glycogen C starch cellulose D glycogen glucose 4 The concentrations of nitrates inside and outside four different root hair cells are shown below. Which cell requires the most energy for the absorption of nitrates by active transport? cell concentration outside the cell / moldm-3 concentration inside the cell / moldm-3 A B C D 9 6 3 6 4 9 7 3 www.KiasuExamPaper.com 60

4 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 5 The graph shows the changes in the mass of a piece of plant tissue in distilled water at 30 oC. The following conclusions are made. (i) The plant cells are plasmol ysed between 1.5 hrs to 2.5 hrs. (ii) The plant cells are fully turgid between 1.5 hrs to 2.5 hrs . (iii) The rate of osmosis is highest from 1.5 hrs to 2.5 hrs. (iv) There was no movement of water molecules from 1.5 hrs to 2. 5 hrs. Which conclusion(s) are correct? A (i) only B (ii) only C (ii) and (iii) only D (ii), (iii) and (iv) only 6 It is not advisable to add too much fertilizer around the roots of a plant. Why is this so? A Active transport of mineral salts into the root hair cells would occur. B Mineral salts would diffuse into the root hair cells. C The root hair cells would lose water and the plant would wilt. D Water molecules would move into the root hair cells by osmosis. www.KiasuExamPaper.com 61

5 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 7 The pie-charts below show the composition of four foods. Which food most quickly provides the most readily available energy? 8 Which of the following fluids from a healthy man would produce a positive result with the Biuret test? (i) sweat (ii) saliva (iii) urine (iv) blood plasma A (i), (ii) and (iv) only B (ii) and (iii) only C (ii) and (iv) only D all of the above 9 Four test tubes are set up in the following manner. test tube volume of hydrochloric acid / cm3 volume of cloudy egg-white suspension / cm3 volume of distilled water / cm3 volume of boiled protease / cm3 volume of protease / cm3 1 5.0 2.0 1.0 0.0 0.0 2 5.0 2.0 0.0 1.0 0.0 3 5.0 2.0 0.0 0.0 1.0 4 0.0 2.0 0.0 0.0 1.0 All four test tubes are then placed in a water bath at 37 °C for 20 minutes. What is the result? test tube 1 2 3 4 A clear clear clear clear B clearcloudycloudyclear Ccloudycloudyclearcloudy Dcloudyclearcloudyclear www.KiasuExamPaper.com 62

6 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 10 Which of the following statements is correct? A Carbohydrates make up the main component in cell membranes. B Fats are the main energy source. C Proteins are important in the production of antibodies. D Fibre is considered a nutrient. 11 The diagram shows part of the human alimentary canal. Which two structures produce substances involved in the digestion of fat? A 1 and 5 B 2 and 3 C 3 and 4 D 4 and 5 www.KiasuExamPaper.com 63

7 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 12 The graph below shows curve X which represents the activity of an enzyme at 20 oC. Which curve represents the activity when the temperature is raised to 30 oC and with more enzymes added? 13 The diagram below shows the arrangement of cells inside a green leaf. Which cells contain chloroplasts? A V, W and X B V, W and Y C W, X and Y D W, X and Z www.KiasuExamPaper.com 64

8 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 14 The experiment below was set up to investigate the effect of light intensity on rate of photosynthesis. Which conclusion can be drawn from these results? A Light intensity has no effect on the rate of photosynthesis. B Pond weed will photosynthesise at any light intensity. C The rate of photosynthesis decreases as the light intensity increases. D The rate of photosynthesis increases as the light intensity increases. 15 Which feature helps plants to make the most food by the process of photosynthesis? A broad and flat leaves B variegated leaves C spiky leaves D shiny-surfaced leaves 16 A potometer is an apparatus which can be used to ____________________ . A measure the rate of water uptake in a shoot B measure the rate of transpiration in a shoot C measure the rate of photosynthesis in a shoot D compare the rates of transpiration in different conditions www.KiasuExamPaper.com 65

9 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 17 The diagram shows sections from a leaf, stem and root of a plant. The plant was exposed to carbon dioxide containing radioactive carbon-14. In which tissues would you expect to find radioactive carbon-14 after 2 days? A 1, 3 and 6 B 1, 4 and 5 C 2, 3 and 6 D 2, 4 and 5 18 Which of the following brings about blood clotting of a wound? A red blood cells and components of the blood plasma B platelets and components of blood plasma C red blood cells and platelets D platelets only 19 Which blood vessel has the highest concentration of oxygen? A pulmonary vein B renal vein C hepatic vein D vena cava 20 Which of the following statements about circulation through the heart is incorrect? A The pulmonary arteries carry deoxygenated blood to the lungs. B The chambers on the right hand side of the heart contain oxygenated blood. C The semilunar valves prevent blood flowing backwards into the ventricles. D The pulmonary veins deliver blood to the left atrium. www.KiasuExamPaper.com 66

10 ©BPGHS 2018 6093 / SEC 4 EXP BIO PRELIM / P1 / 18 [Turn over 21 The data in the following table were obtained from a person before and after a race. before raceafter race rate of breathing / breaths/min 15 30 average volume of each breath / cm3 500 1500 concentration of CO2 in exhaled air / % 5 5 If the person’s rate and depth of breathing remained constant during the first 5 minutes of the race, what volume of carbon dioxide in cubic centimeter did he exh