ACSI Y4 IP Biology 2022

Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 2022 FINAL EXAMINATION 2022 YEAR FOUR INTEGRATED PROGRAMME / SBGE / ACS BIOLOGY Paper 1 Multiple Choice 3 October 2022 1 hour Additional materials: Multiple Choice Answer Sheet Soft eraser Soft pencil INSTRUCTIONS TO CANDIDATES Write in soft pencil. Write and shade your index number on the Multiple Choice Answer Sheet in the spaces provided. Do not open this examination paper until instructed to do so. There are forty questions on this question 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 answer in soft pencil on the Multiple Choice Answer Sheet provided. Read the instructions on the Multiple Choice Answer Sheet very carefully. Each correct answer will score one mark. No marks will be deducted for a wrong answer. Any rough working should be done in the question booklet. Electronic calculators may be used. This paper consists of 21 printed pages. INDEX NUMBER Anglo - Chinese School (Independent)

2 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 1 The diagram below shows the structure of a plant cell as seen using an electron microscope. Which structures are involved in the process of enzyme synthesis within this cell? A 1, 2, 4, 5 and 6 B 1, 3 and 6 C 2, 3, 5 and 6 D 3, 4 and 5 2 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

3 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 [Turn over 3 The graph shows the effect of increasing substrate concentration on the rate of enzymatic reaction. What can be reasonably deduced from the shape of the curve? A From E to F, the enzyme concentration is limiting the rate of reaction. B From E to G, substrate concentration is limiting the rate of reaction. C From F to G, the enzyme concentration is limiting the rate of reaction. D From F to G, the substrate concentration is limiting the rate of reaction. rate of reaction concentration of substrate G F E

4 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 4 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

5 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 [Turn over 5 The graph below shows the absorption spectrum for chlorophyll and the action spectrum for photosynthesis. Which wavelength of light is most effective for photosynthesis to take place? A 420 nm B 475 nm C 575 nm D 625 nm 6 An 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 translocatio n 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. a

6 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 7 The diagram below shows part of the digestive system and associated organs of Man. In which structure does emulsification of fats take place? 8 A human heart, when cut along plane XY as in shown in Fig 8.1, produces the cut surface as shown in Fig 8.2. Blood filled regions are indicated by R and S respectively. Fig 8.1 Fig 8.2 Which of the following is not true? A Blood would flow from S into the aorta. B Blood in R would leave the heart via the pulmonary vein. C Blood in S came immediately from the left atrium. D Blood in S would have a higher concentration of oxyhaemoglobin than the blood in R. A B C D

7 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 [Turn over 9 The graph shows changes in the concentrations of various chemical substances in the thigh muscles of a person running vigorously on a treadmill. Which of the following is true? A Line J represents glycogen. B Line K represents carbon dioxide. C Line L represents oxygen. D Line M represents lactic acid. 10 The diagram shows three types of cells. Which cells are found in alveoli and in bronchi? alveoli bronchi A T U and V B T and U V C U and V T D V T and U

8 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 11 Some effects of smoking are listed. 1 paralyses cilia 2 increases heart rate 3 increases mucus production 4 is addictive 5 reduces the amount of oxygen in the blood 6 emphysema Which effects are caused by nicotine? A 1, 2 and 5 B 1 and 3 C 2 and 4 D 3, 4 and 6 12 The diagram shows a part of a mammalian nephron. What happens if the diameter of the blood vessel is enlarged at X? A More glucose will appear in the urine. B More sodium will appear in the urine. C Water reabsorption will be decreased. D The rate of urine production will be reduced.

9 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 [Turn over 13 The table shows a medical report of a patient after some diagnostic tests. He had been given cakes for breakfast eight hours before the tests. diagnostic test glycogen content in liver protein in urine sugar in urine urea in urine result normal amount present present present Which diagnosis about the patient’s body is correct? Key: + = healthy - = malfunctioning pancreas bowman’s capsule in kidney convoluted tubules in kidney A - + + B - + - C + - - D + - + 14 The diagram shows an example of homeostasis in a person. Which two letters represent negative feedback changes? A W and X B W and Y C X and Z D Y and Z

10 Anglo-Chinese School (Independent) Year 4 IP/SBGE/ACS Biology Final Examination Paper 1 202 2 15 The 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 16 The graph shows changes in a person’s blood glucose concentration over four hours. What might cause the changes at X and Y? X Y A decreased insulin decreased adrenaline B decreased insulin increased adrenaline C increased adrenaline increased insulin D increased insulin increased adrenaline