Fuhua Pure Biology Prelim 2024 Paper 1

[Turn Over Candidate Name: Class: Index No.: FUHUA SECONDARY SCHOOL Secondary Four Express PRELIMINARY EXAMINATION 2024 4E Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Seco ndary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Seco ndary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Seco ndary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Seco ndary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Secondary School Fuhua Seco ndary School Biology 6093/1 Paper 1 Additional Materials: OMR Sheet DATE 28 August 2024 TIME 1000 – 1100 DURATION 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the OMR and this question booklet. There are forty questions on 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 OMR provided. Read the instructions on the OMR very carefully. 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. The use of an approved scientific calculator is expected, where appropriate FOR EXAMINER’S USE PARENT’S SIGNATURE Setter: Ms Veronica Tei Vetter Mr Nicholas Liu This document consists of 18 printed pages, including this page.

2 Multiple-Choice Questions [40 marks] Shade your answers on the OMR sheet provided. 1 The diagram shows one type of plant cell. What type of cell is it? A epidermal cell of a leaf B mesophyll cell of a leaf C root hair cell D xylem cell 2 In a practical lesson, a student makes the following observations about a cell that was extracted from an organism. ‘They have a cell wall and a circular DNA. There are photosynthetic pigments present. There was no nucleus.’ What is being described? A bacterium B companion cell C sieve tube elements D virus 3 The diagram represents a cell as seen under the electron microscope. Which structure is responsible for the synthesis of pepsin? A B D C

3 [Turn Over 4 The diagram shows an experiment set up to investigate osmosis in living cells. What happens to the volumes of water and sugar solution after 12 hours? volume of water volume of sugar solution A decreases increases B increases increases C increases remains the same D remains the same decreases 5 Sunflower seeds contain a nutrient which is broken down by lipase during germination. Which test would detect this nutrient? A Benedict’s test B biuret test C ethanol emulsion test D iodine test 6 What can be said to be true of all enzymes? their optimum pH is 7 they are made from amino acids they move about randomly in a fluid A    key ✓ = yes  = no B  ✓ ✓ C ✓  ✓ D ✓ ✓  water glass dish potato concentrated sugar solution

4 7 Four bags made of partially permeable membrane are placed in tubes of water as shown in the diagram. After 20 minutes at 35 °C , a sample of the water around the bag in each tube is boiled with Benedict's solution. What are the expected results? tube 1 tube 2 tube 3 tube 4 A blue brick-red blue brick-red B blue brick-red brick-red blue C brick-red blue brick-red blue D brick-red brick-red blue brick-red 8 The graph shows the effect of temperature on the activity of four different enzymes. Which conclusion about the data in the graph is correct? A Enzyme P and enzyme Q are both active at 25 oC. B Enzyme R and enzyme S are both active at 75 oC. C Enzyme P has an optimum temperature of 0 oC. D Enzyme S has an optimum temperature above 100 oC. bag made of partially permeable membrane starch solution starch solution and saliva saliva reducing sugar solution tube 1 tube 2 tube 3 tube 4 water water enzyme activity temperature / oC P Q R S

5 [Turn Over 9 The enzyme catalase, found in potato, speeds up the breakdown of hydrogen peroxide. The reaction releases a froth of oxygen bubbles. The diagram shows an experiment to find the effect of changes in pH on the rate of this reaction. The table shows the time taken for the froth of bubbles to reach the top of the test -tube at different pH values. pH 4 5 6 7 Time taken for the froth of bubbles to reach the top of test-tube / min 4 3 1 2 Which pH is nearest to the optimum (best) for this enzyme? A pH 4 B рН 5 C рН 6 D pH 7 10 A student ate a meal which contained a type of biomolecule, X. The digestion of biomolecule X started in the mouth and finished in the duodenum. What is the product of the complete digestion of biomolecule X? A fructose B glycerol C glucose D starch froth of oxygen bubbles piece of potato dilute hydrogen peroxide solution

6 11 A person who has coeliac disease has flattened villi in their ileum. If a person with coeliac disease eats the same quantity and types of food as a disease -free person, they will have lower levels of glucose in their hepatic portal vein. Which row explains this? capillaries do not absorb the glucose molecules the surface area of the ileum is reduced A ✓ ✓ key ✓ = yes  = no B ✓  C  ✓ D   12 The diagram shows the digestive system. Which part absorbs the most water? 13 The speed of blood flow was measured in the pulmonary artery, pulmonary capillaries and pulmonary vein. Which of the following results could be correct? speed of blood flow in pulmonary artery / cm s-1 speed of blood flow in pulmonary capillaries / cm s-1 speed of blood flow in pulmonary vein / cm s-1 A 14 8 5 B 14 5 8 C 5 8 14 D 5 14 8

7 [Turn Over 14 The photomicrograph shows human blood. Which component cannot function effectively if a person's diet lacks iron? 15 The graph shows pressure changes in the left side of the heart, during a single heart beat. At which point (s) on the graph are the semi-lunar valve and tricuspid valve forced shut? A P only B P and S C P, Q and V D Q and V A B C D P Q S V

8 16 Parts of the human circulatory system are listed. 1 arteries 3 heart 2 capillaries 4 veins Which structures have valves to ensure the one-way flow of blood? A 1 and 2 B 1, 3 and 4 C 3 and 4 D 4 only 17 What are the functions of the diaphragm muscles and the cilia in the human gas exchange system? diaphragm muscles cilia A contracts to cause breathing in to trap bacteria from the air B contracts to cause breathing out to move mucus towards the throat C relaxes to cause breathing in to trap bacteria from the air D relaxes to cause breathing out to move mucus towards the throat 18 The diagram shows the composition of four samples of air (O2 = oxygen, CO2 = carbon dioxide, N2 = nitrogen). Which sample is inspired air and which sample is expired air? inspired air expired air A K N B L K C M L D N M composition / % K L M N

9 [Turn Over 19 The table shows the death rates from lung cancer in a country amongst smokers and non - smokers. average number of cigarettes smoked per day deaths from lung cancer per year per 100 000 people 0 10 1-14 78 15-2