NYGH 2017-S3EOY-IP Bio P2

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2017 Secondary Three BIOLOGY Paper 2 Theory Paper 1 hour 45 minutes Monday 2 October 2017 1045 - 1230 Additional materials: 3 writing papers and 1 graph paper READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class in the spaces at the top of this page and on any separate answer paper used. Write in dark blue or black pen on both sides of the paper. Do not use staples, paper clips, highlighters or correction tape. Section A (40 marks) Answer all questions. Write your answers in the spaces provided on the question paper. Section B (30 marks) Answer all questions including questions 6, 7 and 8 Either or 8 Or. Write your answers on the separate writing paper provided. At the end of the examination, 1. fasten all your work securely together; 2. tick 8 Either (for Either) or 8 Or (for Or) next to the question number 8 in the grid below to indicate which question you have answered. INFORMATION FOR CANDIDATES You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. The 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) Section A (40 marks) 1 (8 marks) 2 (5 marks) 3 (9 marks) 4 (8 marks) 5 (10 marks) Section B (30 marks) 6 (10 marks) 7 (10 marks) 8 Either (10 marks) 8 Or (10 marks) Total (100 marks) Setters: OChee & LSM This document consists of 11 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2017 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School IP Biology /II Section A Answer all questions. 1 Fig. 1.1 shows a pair of cells. Fig. 1.1 (a) (i) Name the cells. [1] (ii) Describe one function of the cells. [1] (b) (i) The cells are adapted to perform their function(s). Label two such adaptations on Fig. 1.1. [2] (ii) Explain how the adaptations in (b)(i) help the cells in performing their functions. [4] [Total: 8]

2017 End- of-Year Examination Secondary Three 3 Nanyang Girls’ High School IP Biology /II [Turn over 2 Fig. 2.1 shows a dipeptide. Fig. 2.1 (a) (i) On Fig. 2.1, circle and label the amino group, and the acidic group. [1] (ii) State the enzyme required to catalyse the digestion of the dipeptide into amino acids. [1] (iii) State a biological consequence if a person fails to produce the enzyme in (a)(ii). [1] (b) The dipeptide in Fig. 2.1 was digested into amino acids. Draw the products of this digestion in the space below. [2] [Total: 5]

2017 End-of-Year Examination Secondary Three 4 Nanyang Girls’ High School IP Biology /II 3 Fig. 3.1 shows a potometer. Fig. 3.1 (a) Table 3.1 shows the readings taken from a potometer, which was set up as in Fig. 3.1. The air bubble was not reset to zero after each set of readings were taken. Table 3.1 time / min marking of bubble showing volume / ml trial 1 trial 2 trial 3 0 0.1 1.3 2.6 30 1.3 2.6 3.7 Calculate the mean transpiration rate of the plant in ml / min. Show your working clearly. [2] (b) State two assumptions made when using the potometer to measure the rate of transpiration. [2]

2017 End- of-Year Examination Secondary Three 5 Nanyang Girls’ High School IP Biology /II [Turn over (c) An experiment to investigate the effect of temperature on the rate of transpiration was set up as shown in Fig. 3.2. set-up A set-up B Fig. 3.2 The results of the experiment are shown in Table 3.2. Table 3.2 set-up transpiration rate/ arbitrary units 2 8 (i) Fill in Table 3.2 to indicate which set-up gave which results. [1] (ii) Explain your answer in (c)(i). [2] (iii) State two inconsistencies in the experimental design. [2] [Total: 9]

2017 End-of-Year Examination Secondary Three 6 Nanyang Girls’ High School IP Biology /II 4 Fig. 4.1 shows a bar chart illustrating the relative distribution of tissues across the three main types of blood vessels in the human body. Fig. 4.1 (a) State two differences in the relative distribution of tissues in the walls of blood vessels X, Y and Z? [2] (b) Based on the differences in relative distribution of tissues stated in part (a), predict two differences in the roles of blood vessels X, Y and Z? [2] muscular tissue elastic tissue endothelium X Z Key: relative distribution of tissues Y

2017 End- of-Year Examination Secondary Three 7 Nanyang Girls’ High School IP Biology /II [Turn over (c) Fig. 4.2 shows the changes in pressure in the left side of a human’s heart during a normal cardiac cycle. Fig. 4.2 (i) Which curve, 1 or 2, in Fig. 4.2 corresponds to the pressure in blood vessel Y? Explain your answer. [1] (ii) With reference to Fig. 4.2, predict how the ventricular pressure curve will differ for the right ventricle. Explain your prediction. [3] [Total: 8] curve 1 curve 2 ventricular pressure curve 0 20 40 60 80 100 120 pressure / mm Hg

2017 End-of-Year Examination Secondary Three 8 Nanyang Girls’ High School IP Biology /II 5 An experiment was conducted to investigate the rate of breathing of a person performing various activities. During each activity, the volume of air taken in at each breath and number of breaths per minute were measured and recorded. The results are shown in Table 5.1. Table 5.1 type of activity volume of air per breath / cm3 number of breaths per minute volume of air breathed in per minute running 1000 40 walking 700 28 standing 550 22 sleeping 500 20 (a) Calculate the volume of air breathed in per minute for each activity and complete Table 5.1. [2] (b) Explain the change in volume of air breathed in per minute when the person switches from walking to running. [2] (c) Assuming that the person has achieved his maximum breathing rate shown in Table 5.1, describe and explain the consequences he might experience if he continues running. [3]

2017 End- of-Year Examination Secondary Three 9 Nanyang Girls’ High School IP Biology /II [Turn over (d) Inhalation and exhalation are processes that result in air flowing into and out of the lungs respectively. State three differences between inhalation and exhalation. [3] [Total: 10]

2017 End-of-Year Examination Secondary Three 10 Nanyang Girls’ High School IP Biology /II Section B Answer three questions on the separate writing paper provided. The last question is in the form of either/or and only one of the alternatives should be attempted. Each question carries ten marks. 6 (a) Describe, with specific examples, how protein transporters are used in life processes in plants and animals. [3] (b) Six test tubes were set up at different pH values. Each test tube contained the same quantity of starch and amylase in water. Table 7.1 shows the time taken for the reaction to be completed in each test-tube. Table 7.1 pH 1 3 5 7 9 11 time taken for reaction to be completed/s 95 64 42 5 35 66 (i) On a sheet of graph paper, plot a graph from the data given in Table 7.1. [4] (ii) Describe and explain the shape of the graph. [2] (iii) Using the graph, determine the time taken for the reaction to be completed at pH