PLMGSS 2024 4E ScBio P1 QP

CANDIDATE NAME CLASS CLASS INDEX NUMBER CENTRE NUMBER INDEX NUMBER SCIENCE (BIOLOGY) 5088 / 01 Paper 1 Multiple Choice 1 August 2024 Additional Materials: Multiple Choice Answer Sheet Redox Reati 30 minutes READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name and index number on all the work you hand in. There are twenty multiple choice 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 separate Answer Sheet. 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. This paper consists of 11 pages including this cover page Paya Lebar Methodist Girls’ School (Secondary) Preliminary Examination 2024 Secondary 4 Express / G3

2 [Turn over 1 The diagram shows a mesophyll cell. Which structure(s) are not found in animal cells? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 5 2 The diagram shows some of the apparatus used in an osmosis investigation. In this investigation a dialysis tubing bag was filled with distilled water, sealed and weighed. The dialysis tubing bag was then immersed in concentrated sucrose solution for one hour. After one hour the dialysis tubing bag was removed from the beaker, the surface was dried and the bag was reweighed. Which row explains what will happen during the investigation? mass of the dialysis tubing bag at the end net movement of sucrose molecules net movement of water molecules A decreases none out of the bag B decreases none into the bag C increases into the bag into the bag D increases into the bag out of the bag dialysis tubing bag containing distilled water concentrated sucrose solution

3 [Turn over 3 Which of the statements about the movement of substances involve diffusion? 1 movement of carbon dioxide from body cells into the bloodstream 2 movement of glucose from the ileum into the bloodstream 3 movement of mineral ions into root hair cells in plants A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 4 Large molecules are synthesised from smaller basic units. What is the basic unit of maltose? A amino acid B glycerol C glucose D starch 5 Which diagram of an enzyme, active site and substrate is correct? A B C D enzyme substrate active site substrate enzyme active site active site substrate enzyme active site enzyme substrate

4 [Turn over 6 What is the function of bile? A to acidify the food entering the duodenum B to break up fats into smaller droplets C to activate enzymes digesting glycerol D to produce fat-digesting enzymes 7 Proteases are enzymes that break down proteins into amino acids. A student sets up an experiment to investigate the effect of different temperatures on the action of protease on egg albumin. He measured the amount of protease in the solution after 30 minutes at different temperatures. Which graph would you expect the student to draw from his result? A B amount of protease after 30 minutes amount of protease after 30 minutes amount of protease after 30 minutes amount of protease after 30 minutes temperature / C temperature / C temperature / C temperature / C C D

5 [Turn over 8 The graph shows the oxygen released and taken up by a tree during a 24 hour period. Which statement best describes the situation at point X? A Photosynthesis begins. B Respiration stops. C The rate of respiration equals that of the rate of photosynthesis. D The rate of respiration is greater than the rate of photosynthesis. 9 Which graph shows the change of lactic acid concentration in a thigh muscle of a boy who jumps vigorously for 10 minutes and then sits down for another 10 minutes? A B C D oxygen released by tree oxygen taken up by tree midday midnight 0 X lactic acid conc. time/min 0 10 20 lactic acid conc. time/min 0 10 20 lactic acid conc. time/min 0 10 20 lactic acid conc. time/min 0 10 20

6 [Turn over 10 A green leaf is picked at time 0700h and immediately placed in a sealed test tube containing hydrogen carbonate indicator solution. The test tube is kept near a window for 24 hours. The table below shows how the indicator changes in colour. Which colour will the hydrogen carbonate indicator be at 1200h in the afternoon and 2300h at night? 1200 h 2300 h A purple yellow B red purple C yellow purple D yellow red 11 The diagram shows a plant shoot and the same shoot six hours later. Which change in environmental conditions would not cause this change in the shoot? A an increase in temperature B an increase in humidity C an increase in wind speed D an increase in light intensity leaf hydrogen carbonate indicator

7 [Turn over 12 Which processes take place in the liver? 1 conversion of glucose to glycogen 2 conversion of glycogen to glucose 3 production of amino acids from urea 4 conversion of harmful substances to harmless ones A 1 and 3 B 2 and 4 C 1, 2 and 3 D 1, 2 and 4 13 The diagram represents part of the human circulatory system. Where is the blood pressure highest? D A B C right side of the heart left side of the heart

8 [Turn over 14 The diagram shows the left -hand side of the human heart when the ventricle is relaxed. What happens when the ventricle contracts? valve at X valve at Y type of blood in vessel 1 A closed open oxygenated B closed open deoxygenated C open closed oxygenated D open closed deoxygenated 15 Human Immunodeficiency Virus (HIV) and influenza are examples of infectious diseases. What are the similarities between them? 1 Both can be treated by antibiotics. 2 Both can be spread through respiratory droplets. 3 Both can spread from one person to another. 4 Both can be spread through contaminated food. A 3 only B 1 and 2 C 2 and 3 D 1, 3 and 4 muscular ventricle wall Y X vessel 1

9 [Turn over 16 The diagram shows part of a food web. Which pyramid of numbers is based on this food web? A B C D 17 Which statement incorrectly describes the function or structure of a gene? A A change in gene sequence is known as a mutation. B A gene codes for the production of more than one type of nucleotide. C A gene consists of a sequence of nucleotides. D A gene is a unit of inheritance.

10 [Turn over 18 A woman’s menstrual period started on the 5th of December. December Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 On which date will the progesterone levels most likely be the highest? A 4 December B 17 December C 25 December D 31 December 19 Two persons have muta