Broadrick 2019 Bio Prelim P1 QP

This question paper consists of 20 printed pages including this page. [Turn over Name Class Index Number BROADRICK SECONDARY SCHOOL SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2019 BIOLOGY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6093/01 Sep 2019 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid Write your name, index number and class on the OTAS answer sheet. 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 OTAS 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 an approved scientific calculator is expected, where appropriate. www.KiasuExamPaper.com 144

2 6093/1/9/19 1. Which of the following is found in all living cells? A centrioles and nucleus B chloroplast and protoplasm C golgi apparatus and cell membrane D vacuole and cell wall 2. The diagram below shows a general animal cell. Which of the structures would be involved in the final secretion of digestive enzymes from this cell? 3. A few leaves of purple cabbage were placed in a beaker of water for 10 minutes. The water remained colourless after the 10 minutes. The beaker was then heated to 100°C for 5 minutes. After boiling , the water turned purple. Which of the following best explains this observation? A The pigments gained more kinetic energy upon heating and were able to diffuse out of the leaves quickly, hence the coloured water in just 5 minutes. B The cell walls were denatured upon heating, allowing the pigment to diffuse into the water. C During the boiling, the cell membranes were damaged, hence allowing the pigment to diffuse into the water. D Heating increases the solubility of the pigment, thus colouring the water purple. A B C D www.KiasuExamPaper.com 145

3 6093/1/19 [Turn over 4. Which of these processes require energy from respiration? Diffusion Osmosis A 99 B 9 8 C 89 D 88 5. An experiment was carried out to investigate the digestion of starch using amylase at two different temperatures, 100C and 400C. A sample is taken every 15 seconds and placed into each well as shown below. Each well contains 2 drops of iodine solution and 15 samples were taken from each temperature condition. The results are shown below. Which of the following shows the correct temperatures and times for the complete digestion of starch? Temperature / 0Ct ime/s A 10 60 40 210 B 10 210 40 60 C 40 45 10 195 D 40 195 10 45 Key: blue-black yellow- brown www.KiasuExamPaper.com 146

4 6093/1/9/19 6. The graph shows changing energy levels during a reaction, with and without the presence of the enzyme specific to this reaction. What is the activation energy of the reaction without the presence of the enzyme? 7. Which graph represents the activity of amylase in starch digestion? energy progress of reaction A B C D Location along alimentary canal starch concentration mouth oesophagus stomach ileum www.KiasuExamPaper.com 147

5 6093/1/19 [Turn over 8. The diagrams show a villus from the small intestine and an enlarged view of a cell from region P. Which statement is correct? A Amino acids are absorbed through the microvilli and used by the cell for aerobic respiration. B Fats diffuse into P and enter Q to be distributed. C Mitochondria releases energy for the active transport of proteins into R. D Microvilli increases surface area to volume ratio of P for the absorption of glucose into R. 9. A photosynthetic plant was given the radioactive isotope of oxygen, O18. Where would this isotope be eventually located? A the starch grains in the mesophyll cells B the oxygen gas given out by photosynthesis C the carbon dioxide formed in respiration D the glucose made from photosynthesis P Q R www.KiasuExamPaper.com 148

6 6093/1/9/19 10. The graph below shows how the rate of photosynthesis in a plant varies with light intensity at two different carbon dioxide concentrations. The t emperature is kept constant at 20oC. At which light intensity is light not a limiting factor at both 0.04% and 1% carbon dioxide concentration? 11. The diagram below shows the pathway of water movement from the soil into the root of a plant. Osmosis occurs in _________________. A (1) and (2) only B (1) , (2) and (3) only C (2) , (3) and (4) only D (1), (2), (3) and (4) S R Q P www.KiasuExamPaper.com 149

7 6093/1/19 [Turn over 12. The diagram below shows an experiment set-up to measure the rate of transpiration of a shoot. There were several mistakes in the above experimental set-up. Which of the following are the corrections that have to be made? I The bottle should be completely filled with water. II A tap funnel should be used instead of a thistle funnel. III The end of the shoot should be completely immersed in water. IV Dilute hydrogencarbonate solution should be used instead of t ap water to provide a source of carbon dioxide to the shoot. A I and III B II and III C I, II and IV D II, III, IV thistle funnel capillary tube air bubble bottle tap water www.KiasuExamPaper.com 150

8 6093/1/9/19 13. The graph below shows the pressure changes in the left side of the heart during a single heartbeat. At which point A to D, is the atrioventricular/bicuspid valve pushed close? 14. A certain genetic disease results in the inability to produce prothrombin. Which symptoms will the patients suffering from this disease most likely have? A aching muscles and insomnia B fatigue and breathlessness C headaches and chronic diarrhoea D nosebleeds and blood in urine 15 Which reaction is catalyzed by carbonic anhydrase when red blood cells pass through the lungs? A CO2 + H2O Æ H2CO3 B HCO3í + H+ Æ H2CO3 C H2CO3 Æ CO2 + H2O D H2CO3 Æ HCO3í + H+ www.KiasuExamPaper.com 151

9 6093/1/19 [Turn over 16. Some effects of tobacco smoking are listed below. 1 Bronchitis 2 Uncontrolled division in some cells 3 Increase in alertness 4 Increase in heart rate 5 Increase in mucus production 6 Increase in blood pressure Which effects are caused by nicotine and tar respectively? nicotine tar A 1, 2 and 5 4 and 6 B 3 and 6 1 and 5 C 3, 4 and 6 1, 2 and 5 D 1, 2 and 4 3, 5 and 6 17. The diagram refers to the control of water potential in blood. Which statement best explains why this is a negative feedback system? A It decreases the amount of water in blood. B It increases any change in the amount of water in blood. C It increases the amount of water in blood. D It reverses any change in the amount of water in blood. water in blood rising water in blood falling less water in urine more water in urine www.KiasuExamPaper.com 152

10 6093/1/9/19 18. The diagrams show vertical sections of kidneys of coypu, brown rat and kangaroo rat, showing the relative sizes of cortex and medulla. Coypu are found in fresh water and are never short of water to drink. Brown rats are able to go some days without drinking. Kangaroo rats are able to live in deserts without drinking at all. Which kidney 1, 2 or 3 is suitable for coypu, brown rats and kangaroo rats in order for them to adapt to their living environment? 12 3 A brown rat coypu kangaroo rat B brown rat kangaroo rat coypu C kangaroo rat brown rat coypu D kangaroo rat coypu brown rat 19. Which factors are controlled by homeostasis? Temperature in the stomach pH in the duodenum Glucose concentration in blood Water content in the ileum A ¥ × ¥ × B ¥ ×× ¥ C × ¥¥ ¥ D ×× ¥ × 1 2 3 www.KiasuExamPaper.com 153