igcse2011年春季生物试卷0610_s11_qp_31.pdf

This document consists of 18 printed pages and 2 blank pages. IB11 06_0610_31_HI/FP © UCLES 2011 [Turn over *7736755613*For Examiner's Use 1 2 3 4 5 6 Total UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education BIOLOGY 0610/31 Paper 3 Extended May/June 2011 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. SUITABLE FOR HEARING IMPAIRED CANDIDATES. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. www.XtremeP2 © UCLES 2011 0610/31/M/J/11 For Examiner's Use 1 Fig. 1.1 shows a section of a villus at two different magnifications. ×270×110red blood cellsmuscle tissue.................................................................................................................................Fig. 1.1 (a) Label the structures shown in Fig. 1.1. Write the labels in the boxes in Fig. 1.1. [3] 3 © UCLES 2011 0610/31/M/J/11 [Turn over For Examiner's Use (b) Suggest the role of the muscle tissue shown in the villus in Fig. 1.1. [2] Fig. 1.2 shows an experiment to investigate the uptake of glucose by cells of the villi. • Two leak-proof bags were set up. • One bag was made from artificial partially permeable membrane (Visking tubing). • The other bag was made from a piece of small intestine containing living cells, with its inner surface inside the bag. • The bags were filled with equal volumes of a dilute glucose solution. • The bags were suspended in the same glucose solution for two hours. • After two hours, the volumes of the bags were measured and the contents were tested for the concentration of glucose. glass rod to support bagsdilute glucose solution maintained at 37 °C10 cm length of small intestine containing living cells10 cm length of artificial partially permeable membrane (Visking tubing)beakerdilute glucose solution inside bagsFig. 1.2 Inside the bag made from small intestine the volume and concentration of the glucose solution decreased. There were no changes to the volume and concentration in the Visking tubing bag. (c) State and explain the process responsible for the decrease in the glucose concentration in the bag made from small intestine. [2] 4 © UCLES 2011 0610/31/M/J/11 For Examiner's Use (d) After two hours there was less water in the bag made from small intestine. The volume of water in the bag made from small intestine decreased, but the volume in the bag made from Visking tubing did not change. Explain why. [3] (e) An investigation studied the flow of water into and out of the human alimentary canal. Table 1.1 shows the results. Table 1.1 water into the alimentary canal water out of the alimentary canal source of water volume of water / dm3 per day method of water loss volume of water / dm3 per day water from diet 2.5 stomach to the blood 0.00 saliva 1.5 small intestine to the blood 9.00 gastric juice 2.4 large intestine to the blood 0.85 bile 0.8 in the faeces 0.15 pancreatic juice 0.8 intestinal secretions 2.0 (i) Name the part of the alimentary canal that secretes most water in a digestive juice. [1] (ii) Name the part of the alimentary canal that absorbs most water. [1] 5 © UCLES 2011 0610/31/M/J/11 [Turn over For Examiner's Use (iii) Explain why water is added to food by the secretions shown in Table 1.1. [3] (iv) Explain why it is important that water is absorbed in the alimentary canal. [2] [Total: 17] 6 © UCLES 2011 0610/31/M/J/11 For Examiner's Use 2 Fig. 2.1 shows part of the nitrogen cycle. nitrogen in the airdead organic matterammonium ionsnitrate ionsherbivorebean plant (legume) with root nodulesABFig. 2.1 (a) Name the processes A and B shown in Fig. 2.1. A B [2] (b) Fig. 2.1 shows that legumes have root nodules. Explain why these root nodules are important in the nitrogen cycle. [4] 7 © UCLES 2011 0610/31/M/J/11 [Turn over For Examiner's Use (c) Proteins and DNA are important nitrogen-containing compounds in cells. Describe the roles of proteins and DNA in cells. proteins [3] DNA [2] (d) Many inorganic fertilisers contain compounds of nitrogen. If crop plants do not absorb the fertilisers they can be lost from the soil and pollute freshwater ecosystems, such as lakes and rivers. Describe how fertilisers may affect freshwater ecosystems. [4] [Total: 15] 8 © UCLES 2011 0610/31/M/J/11 For Examiner's Use 3 Fig. 3.1 shows a fetus in the uterus immediately before birth. umbilical cordplacentaamniotic fluidamniotic sacABFig. 3.1 (a) Describe the functions of the amniotic sac and amnio。