ACSI(I) Y4IP 2023 Biology Common Test Paper 2

Name Class Index Number Anglo-Chinese School (Independent) Year 4 IP/SBGE Biology Term 2 Common Test 2023 TERM 1 CLASS TEST BIOLOGY Paper 2 21 April 2023 1 Hour 45 Minutes No Additional Materials are required. INSTRUCTIONS TO STUDENTS Write your name, class, and index number in the spaces at the top of the Question paper. Write in dark blue or black pen. Use a pencil for any diagrams or graphs. Section B and Section C Answer all questions in the spaces provided on the Question paper. At the end of the test, submit the Question paper. INFORMATION FOR CANDIDATES The intended number of marks is given in brackets [ ] at the end of each question or part question. This paper consists of 17 printed pages including this cover page. Name of Parent / Guardian: Signature & Date: Anglo-Chinese School (Independent) YEAR 4 INTEGRATED PROGRAMME / SBGE / ACS TERM 2 COMMON TEST For Examiner’s Use Section A / 30 Section B / 40 Section C / 10 Total / 80

2 Anglo-Chinese School (Independent) Year 4 IP/SBGE Biology Term 2 Common Test 2023 [Turn over Section B 1 Fig. 1 below shows a diagrammatic representation of an artificial kidney machine. Fig. 1 (a) Explain why the tubings are coiled rather than straight. [1] (b) Explain why it is important that the flow of the dialysis fluid is opposite to the blood. [1] Coiled tubings

3 Anglo-Chinese School (Independent) Year 4 IP/SBGE Biology Term 2 Common Test 2023 [Turn over (c) The dialysis fluid contains a carefully regulated amount of dissolved salts and glucose with a composition similar to blood plasma, without nitrogenous waste. (i) Explain why the concentration of glucose in the dialysis fluid is maintained at the same concentration as that in the patient’s blood. [1] (ii) Why must the dialysis fluid be changed regularly? [1] (iii) During dialysis, state which types of blood vessel is blood: (1) withdrawn from the human body (using the new method - fistula). (2) return to the human body. [1] (1) (2) [Total: 5]

4 Anglo-Chinese School (Independent) Year 4 IP/SBGE Biology Term 2 Common Test 2023 [Turn over 2 The graph below shows the level of glucose in the blood plasma after a man has orally taken in 100 g of glucose and 40 g of fat. (a) What is the fluctuation in the level of blood glucose 1 hour after the oral intake of (i) the 100 g of glucose; [1] (ii) the 40 g of fat? [1] (i) (ii) (b) How long does it take for the level of blood glucose to return to normal level after the intake of glucose