MFSS P1/ANS 24

Name Reg. No Class MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL MAYFLOWER SECONDARY SCHOOL 4EX BIOLOGY 6093/01 Paper 1 Multiple Choice [40 Marks] PRELIMINARY EXAMINATIONS Additional Materials: Approved calculator OTAS August 2024 1 hour Instruction to Candidates Do not start reading the questions 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 index number on the OTAS provided. Information for Candidates 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 OTAS. Read the instructions on the OTAS very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. The use of an approved scientific calculator is expected, where appropriate. This question paper consists of 18 printed pages. Setter: Mr Ng Tze How Vetter: Mrs Marie Huang

2 Paper 1 (40 marks) Answer all questions in the OTAS provided. The diagram below shows two plant cells, X and Y. Cell X has a higher water potential than Y. Use this information to answer questions 1 and 2. 1 What process will occur between these two cells? A active transport B diffusion C osmosis D transpiration 2 Which row identifies the direction and the reason for movement of substances between X and Y? Direction Reason A X to Y Salt molecules move from X to Y because there is a higher concentration of salt molecules at X. B X to Y Water molecules move from X to Y because there is a higher water potential at X. C Y to X Salt molecules move from Y to X because there is a higher concentration of salt molecules at Y. D Y to X Water molecules move from Y to X because there is a higher water potential at Y.

3 The diagram below shows an experiment. Use this information to answer questions 3 and 4. 3 Why did the starch suspension change colour? A Iodine molecules diffused in through the membrane. B Iodine molecules diffused out through the membrane. C Starch molecules diffused in through the membrane. D Starch molecules diffused out through the membrane. 4 Which method can increase the rate of reaction in this experiment? A Adding amylase into the iodine solution. B Adding amylase into the starch suspension. C Decreasing the temperature of the set up. D Increasing the temperature the set up. 5 The following diagram shows a portion of a starch molecule. Which diagram represents the outcome of the digestion of the starch molecule by amylase? A B C D

4 6 Several food tests were conducted on a sample of an isotonic drink. Which row is an expected result? Benedict’s test Biuret test Iodine test A brick-red precipitate formed solution remains blue solution remains yellow B solution turns violet brick-red precipitate formed solution remains blue C solution turns violet solution remains blue solution remains yellow D solution remains blue brick-red precipitate formed solution remains yellow 7 Three potato strips ( X, Y and Z ) with the same mass were placed into three different solutions for one hour. The mass of the three potato strips were then compared using a beam balance. The results are shown in the diagram below. Which row identifies the solution each potato strip is placed in? X Y Z A 10% sucrose solution 25% sucrose solution distilled water B 10% sucrose solution distilled water 25% sucrose solution C 25% sucrose solution distilled water 10% sucrose solution D 25% sucrose solution 10% sucrose solution distilled water

5 8 Which statement describes enzyme-catalysed reactions? A All enzymes work best at 37oC. B As an enzyme -catalysed reaction progresses, the concentration of reactants increases. C As the temperature of an enzyme-catalysed reaction increases from 0oC to 20oC, the frequency of effective collisions increases. D Enzymes are denatured as the temperature of an enzyme-catalysed reaction is lowered from 20oC to 0oC. 9 The diagram shows the blood supply of the liver. Which row identifies blood vessel 1, 2 and 3? 1 2 3 A hepatic artery hepatic portal vein hepatic vein B hepatic artery hepatic vein hepatic portal vein C hepatic portal vein hepatic artery hepatic vein D hepatic portal vein hepatic vein hepatic artery 10 What is not likely to be an outcome of the removal of the pancreas? A decrease in the amount of glycogen production in liver and muscle cells B decrease in the amount of protein digested C diabetes mellitus D increase in the pH of duodenum

6 11 The following statements were made. 1 the intake of food into the body through the mouth 2 the breakdown of large insoluble food molecules into small soluble ones 3 the uptake and use of food molecules in the cells of the body 4 the movement of food molecules through the wall of the intestine Which row matches the definitions of digestion and assimilation? digestion assimilation A 1 3 B 2 3 C 1 4 D 2 4 12 The following diagram shows a section of the coronary artery with deposition of fats that may result in a heart attack. What statement describes the events that could lead to a heart attack? A Further fat deposits followed by platelet destruction. B Further fat deposits followed by red blood cell destruction. C Restriction of the artery lumen causing less oxygen supply. D Hardening the artery wall preventing diffusion across the wall.

7 13 The graph shows changes in the air pressure within the lungs during one breathing cycle. What causes the change in air pressure during stage X? A contraction of diaphragm B movement of ribs upwards and outwards C relaxation of external intercostal muscles B relaxation of internal intercostal muscles 14 The diagram gives information about blood pressure in various parts of the circulatory system during the cardiac cycle. At which point does the semilunar valve of the aorta close? X

8 15 The diagram shows an apparatus used to measure the respiration rate of small animals. Which row correctly states and explains if the screw clip should be left open or closed? screw clip reason A closed to measure output of carbon dioxide B closed to measure u