1 霹雳怡保培南独立中学 SM POI LAM (SUWA) IPOH FINAL EXAMINATION 2021 BIOLOGY Senior One (Paper 2) ____________________________________________________________________________________ Date : 15th NOVEMBER 2021 Time: 1330-1415 (45 minutes) NAME: ___________________________________ REG NO: _______________ CLASS: S1AI, S1ZI ____________________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your number and candidate number on the Answer Sheet in the spaces provided. 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 soft pencil on the Separate Answer Sheet. This paper consists of 40 marks. 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. This paper consists of 9 printed pages. Prepared by ： TAMILARASI ……………………………………... (TAMILARASI NARAYANASAMY) Checked by： ….….………………… (LOKE WAI CHUAN) Do Not Turn This Page Until You Are Told To Do So
2 1. What is the word equation for aerobic respiration in plants? A carbon dioxide + water → glucose + oxygen B glucose + carbon dioxide → water + oxygen C glucose + oxygen → carbon dioxide + water D glucose + water → carbon dioxide + oxygen 2. What is produced by yeast during anaerobic respiration? A carbon dioxide and water B ethanol and carbon dioxide C ethanol and water D lactic acid 3. Which process releases the most energy from one molecule of glucose? A aerobic respiration B anaerobic respiration in muscle C anaerobic respiration in yeast D photosynthesis 4. Which chemical could be used to show that cells are respiring aerobically? A Benedict’s solution B dilute sulfuric acid C ethanol D limewater 5. Which statement about respiration is not correct? AAll living cells respire. B Heat is always produced. C Plants respire in the light and in the dark. D Plants take in carbon dioxide and give out oxygen. 6. The table shows an analysis of urine and of blood after filtration in the kidney. substance percentage of substance in blood urine glucose 0.10 0.00 salts 0.30 0.60 urea 0.03 2.00 water 90.00 97.00 Which substance is completely reabsorbed by the kidney? A glucose B salts C urea D water
3 7. Which blood vessel has a high carbon dioxide concentration, a low oxygen concentration and a high blood pressure? A aorta B pulmonary artery C pulmonary vein D vena cava 8. Which statement is correct for most veins in the human body? A They carry blood at high pressure. B They have a pulse. C They have valves. D They take blood away from the heart. 9. Where does haemoglobin become oxyhaemoglobin? A heart B kidneys C liver D lungs 10. In which list do all three blood vessels carry oxygenated blood? A aorta, pulmonary artery, renal artery B aorta, pulmonary vein, renal artery C vena cava, pulmonary artery, renal vein D vena cava, pulmonary vein, renal vein 11. Which heart valves are open and which are closed when blood passes out of the right ventricle towards the lungs? A bicuspid (mitral) valve closed, tricuspid valve open B bicuspid (mitral) valve open, semi-lunar valve closed C tricuspid valve closed, semi-lunar valve open D tricuspid valve open, bicuspid (mitral) valve open 12. How often must a blood cell in the renal artery pass through the heart before it again reaches the renal artery? A once B twice C three times D four times 13. A girl holds her breath for 30 seconds, breathes out, and then breathes in. Compared with the air she breathes out, the air she breathes in contains less A carbon dioxide and water vapour. B nitrogen and water vapour. C oxygen and carbon dioxide. D oxygen and nitrogen.
4 14. Which target organ releases glucose into the blood-stream as a result of the action of adrenaline? A adrenal gland B kidney C liver D pancreas 15. How does sweating cool the body? A Sweating causes vasodilation. B Sweating decreases the water content of the blood. C Urea and salt are lost from the body in sweat. D Water in sweat evaporates from the skin. 16. A boy accidentally touches a very hot object and immediately takes his hand away. In this reflex action, what is the effector? A a heat receptor in his hand B a motor neurone C a muscle in his arm D the spinal cord 17. The diagram shows a cell. What type of cell is shown? A ciliated cell B motor neurone C relay neurone D sensory neurone 18. Possible effects of drug abuse include 1 addiction 2 reduced self-control 3 severe withdrawal symptoms Which effects may occur as a result of drinking too much alcohol? A 1, 2 and 3 B 1 and 2 only C 1 only D 2 and 3 only
5 19. The table shows the approximate composition of air breathed out by a mammal. gas air breathed out/% nitrogen 80 oxygen 16 carbon dioxide 4 Where does the nitrogen in the air breathed out come from? A It is a product of proteins broken down in the mammal. B It is a product of respiration. C It is exchanged for oxygen which is taken into the blood. D It is in the air that was breathed in. 20. The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest? B 21. Which substance is lost from the body by the kidneys, lungs and skin? A carbon dioxide B excess ions C urea D water 22. What are features of gaseous exchange surfaces in animals? A thick-walled, dry, large area B thick-walled, moist, small area C thin-walled, dry, small area D thin-walled, moist, large area
6 23. When a bright light is shone into the eye, the diameter of pupil decreases. What is this an example of? A accommodation B a simple reflex C photosynthesis D voluntary response 24. After a meal, the concentration of blood glucose increases. What then causes the concentration of blood glucose to return to normal? A adrenaline B blood cells C insulin D platelets 25. What is true for a runner, at the end of a marathon race, in a hot climate? A sweating and vasoconstriction B sweating and vasodilation C vasoconstriction only D vasodilation only 26. What is an example of homeostasis? A breathing in oxygen B regulating blood glucose C removing undigested food through the anus D urinating to empty the bladder 27. Which organ breaks down heroin and alcohol? A bladder B brain C kidney D liver 28. The oxygen carrying capacity of the blood of smokers is less than that of non-smokers. Which component of cigarette smoke causes this? A carbon monoxide B nicotine C smoke particles D tar 29. Which component of cigarette smoke is most likely to cause lung cancer? A carbon dioxide B carbon monoxide C nicotine D tar
7 30. The diagram shows some structures in the human neck and thorax. Q The lining of tube Q has cilia. What is an important function of the cilia? A to help in the exchange of gases B to increase the internal surface area of tube Q C to moisten the air entering and leaving the lungs D to move mucus towards the throat 31. The diagram shows apparatus used to investigate anaerobic respiration in yeast. What happens to the coloured liquid? A moves rapidly to the left B moves slowly to the left C moves to the right D stays still
8 32. Where are hormones removed from the blood and broken down in the human body? A gall bladder B kidneys C liver D stomach 33. Which two substances are both reabsorbed in the kidneys? A glucose and salts B glucose and starch C glycogen and salts D glycogen and starch 34. How does blood change as it passes through a kidney? A It gains glucose. B It gains salts. C It loses protein. D It loses urea. 35. Which organs remove excretory products from the blood? A bladder and liver B bladder and lungs C kidneys and bladder D lungs and kidneys 36. In which order does urea pass through structures in the body? A kidney → ureter → liver → urethra B kidney → urethra → liver → ureter C liver → kidney → ureter → urethra D liver → urethra → kidney → ureter 37. What is an example of gravitropism? A a chemical messenger produced by a plant B a painful sensation in response to a stimulus C the growth of a plant root towards the centre of the Earth D the growth of a plant shoot towards light 38. Read the following sentence. In order to prevent the human body from losing heat, the arterioles supplying the skin become narrow. Which process does this sentence describe? A constriction B shivering C sweating D vasodilation
9 39. The graph shows the effect of an antibiotic treatment on bacterial populations in the blood. What conclusion can be drawn from the graph? AAntibiotics are effective against viral and bacterial infections. B Antibiotics cause reduction division in bacteria. C Antibiotics take ten days to kill all bacteria. D Before the start of antibiotic treatment the bacterial population was rising. 40. Cilia are present on the surface of the cells of the trachea. The cilia of a smoker work less effectively than those of a non-smoker. How does this affect the smoker? A Less carbon dioxide is released. B Less oxygen is released. C More bacteria enter the lungs. D More mucus is removed from the lungs. END OF EXAMINATION PAPER
