NYGH 2013-S3EOY-Bio P1

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2013 Secondary Three BIOLOGY Paper 1 Multiple Choice 45 minutes Tuesday 8 October 2013 0800 - 0845 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are thirty questions in this 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 choice in soft pencil on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Setter: DN, LCP, BK & ST This document consists of 15 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over 1

2013 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I 1 The endoplasmic reticulum consists of a network of cisternae that extends through the cytoplasm of a cell. Which characteristics are true for rough endoplasmic reticulum and smooth endoplasmic reticulum? I composed of a phospholipid bilayer II continuous with the nuclear envelope III involved in synthesis of lipids and steroids IV involved in synthesis of polypeptides rough endoplasmic reticulum smooth endoplasmic reticulum A I and II III and IV B II and IV I and III C I and III I and II D III and IV II and IV 2 The table below shows the results of glucose concentrations in various organelles in a plant cell before and after exposure to sunlight. Which organelle is most likely to be the chloroplast? organelle concentration before exposure / mol dm-3 concentration after exposure / mol dm-3 A 20 24 B 87 19 C 95 97 D 21 105 3 While on a trip to a desert, David was bitten by a rattlesnake. He nearly died from haemolysis, the breakage of red blood cells. The following table shows the concentration of three enzymes found in the venom. enzyme Concentration / mg dm -3 carbohydrase 68 phospholipase 56 carbonic anhydrase 15 Which of these enzymes might have been responsible for the haemolysis? A Carbohydrase B Phospholipase C Carbohydrase and carbonic anhydrase D Phospholipase and carbonic anhydrase

2013 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I [Turn over 4 The figure shows an experiment using a selectively permeable membrane. The concentrations of glucose and starch in the visking tubing were tested after 20 minutes. Which of the following shows the results of the experiment? glucose concentration / mol dm -3 starch concentration / mol dm -3 A increased unchanged B decreased unchanged C increased decreased D decreased decreased 5 Strips of potatoes were placed in varying concentrations of sucrose solutions for 20 minutes. Which of the following graphs shows the results of this experiment? visking tubing glucose and starch solution distilled water

2013 End-of-Year Examination Secondary Three 4 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I 6 The table shows the concentration of a hydrophilic substance inside and outside of four different cells. cell concentration inside cell / arbitrary units concentration outside cell / arbitrary units P 2 5 Q 7 2 R 5 12 S 10 2 Which of the following are the most likely processes for absorption of the substance into the cells? P Q R S A simple diffusion active transport simple diffusion active transport B active transport simple diffusion active transport simple diffusion C active transport facilitated diffusion active transport facilitated diffusion D facilitated diffusion active transport facilitated diffusion active transport 7 A sample of food was mixed with water and tested for its contents. The results of the tests are shown in the table below. test results Biuret Test Blue Benedict’s Test Brick red precipitate Iodine Test Brown Alcohol Emulsion Test White emulsion Which of the following can be concluded? protein reducing sugar starch fats A absent present absent present B present absent absent present C absent present present absent D present absent present absent

2013 End-of-Year Examination Secondary Three 5 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I [Turn over 8 5.0 cm3 of 0.01 % amylase solution was added to test tubes that each contain 1.0 cm3 of 1.0 % starch solution and shaken well. Each test tube was then subjected to different temperatures ranging from 0 oC to 50 oC. Which of the following graphs show the results from the above experiment? 9 Potato cells contain an enzyme that breaks down hydrogen peroxide to water and oxygen. The figure below shows the experimental set-up used to conduct four different experiments to investigate between raw or boiled potato discs and level of water. Which of the following shows the correct level of water in test tube X after 10 minutes? type of potato discs level of water A boiled decreased B boiled increased C raw decreased D raw increased water collected oxygen test tube X potato disc hydrogen peroxide solution temperature / C temperature / C temperature / C temperature / C rate of reaction rate of reaction rate of reaction rate of reaction A B C D

2013 End-of-Year Examination Secondary Three 6 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I 10 In beer-making, enzymes present in malting barley hydrolyse starch into sugar. The graph below shows the production of sugar at three different temperatures over a one hour period. All other conditions were controlled. Which of the following best explains the graph above? A Sugar is absent from the malting barley. B The optimum temperature for the enzymes is 50 oC. C At 60oC, all the starch is hydrolysed within 20 minutes. D At 70oC, the enzymes are denatured before all the starch is hydrolysed. 11 Some plants live at the bottom of the oceans and make glucose using energy from chemicals in the hot water that comes out of hydrothermal vents. What is a distinguishing feature of these plants? A They do not need to be green. B They do not need carbon dioxide. C Their enzymes are easily denatured by extreme pH. D Their enzymes are easily denatured by high temperature.

2013 End-of-Year Examination Secondary Three 7 Nanyang Girls’ High School Setter: DN, LCP, BK & ST Biology / I [Turn over Different photosynthetic pigments absorb different wavelengths of light. A spectrophotometer is used to measure the absorption of different wavelengths of light by the different pigments. The resulting absorption spectrum is shown in the diagram below. Use the figure to answer Questions 12 and 13. (Source from http://www.absoluteastronomy.com/topics/Photosynthetically_active_radiation) 12 Which of the following conclusions does not follow from the study of the absorption spectrum by different pigments? A Carotenoid has more than one absorption peak. B Chlorophyll owes its colour to the absorption of green light. C Wavelength of 480 nm is absorbed by chlorophyll b in a large quantity. D Chlorophyll a, chlorophyll b and