NYGH 2019-S3EOY-IP Bio P2A

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2019 Secondary Three IP IP BIOLOGY Paper 2 Theory Paper 1 hour 45 minutes Friday 11 October 2019 1000-1145 Additional materials: Nil READ THESE INSTRUCTIONS FIRST Do not open this document until you are told to do so. Write your name, register number and class in the spaces at the top of this page. Section A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer three questions. Question 10 is in the form of an Either/Or question. Only one part should be answered. Tick 10 Either or 10 Or in the grid-box on the cover page to indicate the question answered. The intended number of marks is given in the brackets [ ] at the end of each question or part question. The use of an approved scientific calculator is expected, where appropriate EXAMINER’S USE Paper 1 (30 marks) Paper 2 Section A (40 marks) 1 (4 marks) 2 (4 marks) 3 (6 marks) 4 (10 marks) 5 (6 marks) 6 (5 marks) 7 (5 marks) Section B (30 marks) 8 (10 marks) 9 (10 marks) tick: 10 Either (10 marks) tick: 10 Or (10 marks) TOTAL (80 marks) Setters: OC, TZZ This document consists of 12 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over A

2019 End-of-Year Examination Secondary Three IP 2 Nanyang Girls’ High School IP Biology Section A (40 marks) Answer all questions. Write your answers in the spaces provided. 1 Fig. 1.1 shows a biological drawing of the cross-section of a tomato fruit. Fig. 1.1 (a) Given that the magnification of the drawing is 2.1X, calculate the actual width of the tomato fruit. The width of the drawing is indicated by the double-headed arrow. Show your working clearly. Give your answer to 1 decimal place. Width of the fruit : ……………………………… [2]

2019 End-of-Year Examination Secondary Three IP 3 Nanyang Girls’ High School IP Biology [Turn over (b) In normal cells, the Golgi apparatus consists of a stack of flattened membrane-bound bodies known as cisternae. In 2017, some scientists performed a ‘knockout’ experiment on cells. They removed two types of Golgi reassembly stacking proteins, GRASP65 and GRASP55, from cells. As a result, the experimental cells had Golgi apparatus that could not form a stack of cisternae, and only had single cisterna. [source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5638586/] Suggest two possible effects if the Golgi apparatus cannot form into a stack. 1.………………………………………………………………………………………… ………………………………………………………………………………………….. 2.………………………………………………………………………………………… ………………………………………………………………………………………….. [2] [total: 4]

2019 End-of-Year Examination Secondary Three IP 4 Nanyang Girls’ High School IP Biology 2 Fig. 2.1 below shows a reaction that occurs in a part of the alimentary canal. Fig. 2.1 (a) (i) Identify compound B. …………………………………………………………………………………… [1] (ii) Name the type of reaction represented in Fig. 2.1. …………………………………………………………………………………… [1] compound A H H H H H H compound B product C products D + enzyme

2019 End-of-Year Examination Secondary Three IP 5 Nanyang Girls’ High School IP Biology [Turn over 3 The “meat” patty used in a vegan burger is made from mycoprotein obtained from the fungus, Fusarium venenatum. Table 3.1 shows the composition of mycoprotein and beef. Table 3.1 nutrient dry mass/ g per 100 g mycoprotein uncooked beef protein 45.0 52.6 fat 11.2 47.4 fibre 21.4 0.0 carbohydrate 21.7 0.0 (a) Using data from table 3.1, state two reasons why eating mycoprotein is healthier than eating beef. …………………………………………………………………………………………... ………………………………………………………………………………………….. …………………………………………………………………………………………... ………………………………………………………………………………………….. [2] (b) Identify the products C and D of the reaction. Product C: ………………………………………… Products D: ………………………………………… [1] (c) People living in the Arctic regions have a diet high in content of compound A. Explain why this is necessary. ………………………………………………………………………………………….. ………………………………………………………………………………………….. [total: 4] [1]

2019 End-of-Year Examination Secondary Three IP 6 Nanyang Girls’ High School IP Biology (b) Fig. 3.2 shows how the mass of fat in beef changes as it passes through the alimentary canal. The width of each band indicates the mass of nutrients present. nutrient buccal cavity stomach duodenum and ileum fat protein protein (blocked pancreatic duct) Fig. 3.2 Suggest why the mass of fat in the beef did not decrease immediately after entering the duodenum. …………………………………………………………………………………………... ………………………………………………………………………………………….. [1] (c) (i) On Fig. 3.2, draw how the mass of protein changes as the beef passes through the alimentary canal. [1] (ii) Due to pancreatic stones, the pancreatic duct of a person was completely blocked. On Fig. 3.2, draw how the mass of protein will change as the beef passes through the alimentary canal. [1] (iii) Explain why the answer from (c)(ii) is different from (c)(i). …………………………………………………………………………………... …………………………………………………………………………………... [total: 6] [1]

2019 End-of-Year Examination Secondary Three IP 7 Nanyang Girls’ High School IP Biology [Turn over 4 (a) Table 4.1 shows the volume of air taken in by two healthy 21-year-old men after running at their maximum effort for a minute. One has stayed at an altitude of 3500 m all his life and the other has lived at sea level all his life. Table 4.1 volume of air taken in per minute/ dm3 min-1 man living at high altitude 151 man living at sea level 130 Based on the data given in Table 4.1, suggest two differences in the internal structure of the lungs of the two men. 1. …………………………………………………………………………………………... …………………………………………………………………………………………... 2. …………………………………………………………………………………………... …………………………………………………………………………………………... [2] Fig. 4.2 shows the oxygen uptake before and during a run done by the man living at sea level. Fig. 4.2 0.0 oxygen uptake/ dm3 min-1 2.0 2.5 3.0 exercise starts exercise ends time/ min 0.5 1.0 1.5 0 5 10 15 20 25 30 35

2019 End-of-Year Examination Secondary Three IP 8 Nanyang Girls’ High School IP Biology (b) (i) Explain the change in oxygen uptake between the 5th and 17th minute of the exercise. …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... [3] (ii) Explain the oxygen uptake between 17th to 20th min. …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... [2] (iii) It took 7 minutes for his oxygen uptake to return to normal levels. Explain why the oxygen uptake did not return to the normal levels immediately. …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... …………………………………………………………………………………... [total: 10] [3]

2019 End-of-Year Examination Secondary Three IP 9 Nanyang Girls’ High School IP Biology [Turn over 5 The kidney is made up of tiny units called kidney tubules, which work in two steps. Step 1: Small substances, both waste materials and useful substances, are filtered out of the blood. The