PLMGS S4Exp 5NA Sc Bio Prelim P1 2025 QP

CANDIDATE NAME CLASS CLASS INDEX NUMBER CENTRE NUMBER INDEX NUMBER SCIENCE (BIOLOGY) 5088 / 01 Paper 1 Multiple Choice 25 August 2025 Redox 1 1 hour Additional Materials: Multiple Choice Answer Sheet [Taken with Sc Chemistry] 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 2025 Secondary 4 Express / G3

2 [Turn over 1 The diagram below shows four different cells. Which structure is found in all cells? A cell wall B nucleus C cell membrane D chloroplast 2 Which of the following statements correctly describe both diffusion and osmosis? A They require energy from mitochondria. B They must move across a partially permeable membrane. C They can occur only in liquid state. D They involve the movement of particles down a concentration gradient. 3 The diagram below shows four different plant cells carrying out aerobic respiration. Which of the following represents the movement of carbon dioxide molecules? A B C D

3 [Turn over 4 The key shows shapes representing small food molecules. Which diagram represents part of a cellulose molecule?

4 [Turn over 5 A group of students investigated the effects of temperature on starch digestion. Equal volumes of amylase and starch were added to the set-up where the temperature was increased from 10oC to 80oC over 20 minutes. Which of the following shows the results of the experiment? A B C D

5 [Turn over 6 A dish is filled with agar jelly containing milk. Four holes were cut in the jelly, and each hole is filled as shown in the diagram. After 30 minutes, which hole will be surrounded by the largest clear area?

6 [Turn over 7 The diagram below shows the human alimentary canal. Which of the following organs produced substances involved in the digestion of fats? A R, V and S B U, Q, and S C P, Q, V and R D Q, R, V and T 8 The table shows the death rates from lung cancer in a country amongst smokers and non-smokers. What can be concluded from the data? A People who smoke 26 or more cigarettes per day die from lung cancer. B People who do not smoke will not get lung cancer. C People who smoke more have a higher chance of getting lung cancer. D Smoking is the leading cause of lung cancer.

7 [Turn over 9 Which statement(s) about aerobic respiration is/are correct? 1 Aerobic respiration releases more energy per molecule of glucose than anaerobic respiration. 2 The waste products of aerobic respiration are carbon dioxide and lactic acid. 3 Aerobic respiration requires oxygen. A 1, 2 and 3 B 1 and 3 only C 2 and 3 only D 3 only 10 The diagram shows an experiment to investigate the effect of light on respiration and photosynthesis. P Q R S The plants were placed in hydrogen carbonate indicator which shows the following colour changes: colour concentration of carbon dioxide yellow high red atmospheric purple low Which of the following shows the correct colour change at the end of the experiment? P Q R S A yellow yellow purple yellow B purple purple red red C red yellow purple yellow D yellow red red purple

8 [Turn over 11 Which of the following shows the effect of humidity on the rate of transpiration? 12 Which of the following blood vessels carries oxygenated blood? A pulmonary artery and aorta B renal artery and hepatic vein C vena cava and hepatic portal vein D pulmonary vein and aorta humidity rate of transpiration humidity rate of transpiration humidity rate of transpiration humidity rate of transpiration

9 [Turn over 13 The diagram represents a simplified human circulatory system. Which structure represents the heart? 14 The diagram below shows a food chain. apple tree → caterpillar → songbird → hawk Which of the following shows the correct pyramid of numbers? A B C D

10 [Turn over 15 Which of the following would antibiotics be effective against? A influenza B pneumococcal C human immunodeficiency virus D lung cancer 16 It was found that cytosine forms 34% of DNA molecules. What percentage of the bases would be thymine? A 16% B 32% C 34% D 68% 17 Which of the following human phenotypes is caused by genes only? A skin colour B height C body mass D ability to roll tongue 18 The diagram shows the changes in the thickness of the uterus lining of a woman during her menstrual cycle. Which of the following shows the fertile period of the woman?