KSS PRELIM 2026 4Exp Biology P1 for W6

1 [Turn over Candidate Name: _______________________ ( ) Class: _________ KRANJI SECONDARY SCHOOL Preliminary Examination Secondary 4 Express BIOLOGY 6093/01 Paper 1 Multiple Choice QUESTION BOOKLET Wednesday XX September 2026 1 hour KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number on the Answer Sheet in the spaces provided. 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 separate OMR Sheet. Read the instructions on the Answer Sheet 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. Set by: Ms Karen Wong This document consists of 17 printed pages and 1 blank page. 4E Session 3

2 1 The table shows some features of cells. Which row is correct? feature muscle cell red blood cell A absorbs oxygen yes yes B cytoplasm present yes no C large surface area yes yes D nucleus present no no 2 The photomicrograph shows the appearance of onion epidermal cells after they have been immersed in sucrose solution for one hour. What is found in the space labelled X? A air B cytoplasm C sucrose solution D water X

3 [Turn over 3 A student cuts three identical strips from a potato . Each strip is 5.0 cm × 0.5 cm × 0.5 cm. Each potato strip is placed into three different concentrations of sugar solution. After one hour, he remove s the potato strips from the sugar solutions and measure s their lengths. The results are shown in the table. solution length after one hour / cm X 5.3 Y 4.6 Z 4.9 What can be concluded from these results? A Solution Y has a lower water potential than the potato cells. B Solution Z has the lowest water potential. C The potato strip in solution X increases in length because it takes up sugar. D The potato strip in solution Y decreases in length because it loses sugar. 4 The table below shows the results of an investigation into the rate of absorption of digested food in the presence and the absence of oxygen. type of digested food absorption in the presence of oxygen / arbitrary units absorption in the absence of oxygen / arbitrary units fatty acids 1.8 1.7 glucose 7.0 2.3 amino acids 6.2 2.4 glycerol 4.5 4.6 Which of the following correctly explains the results obtained from the investigation? A All the digested food is absorbed by active transport and diffusion. B Amino acids and glycerol are absorbed only by active transport. C Glucose is absorbed mainly by diffusion only. D Fatty acids and glycerol are absorbed mainly by diffusion. 5 Which of the following statements about glycogen and cellulose is correct? A Both are made of glucose molecules. B Both are sources of energy in humans. C Both maintain the shape of cells. D Cellulose is found only in plants, glycogen is found in both plants and animals.

4 6 Which of the following biological molecules contain carbon, hydrogen and oxygen only? 1 fibrin 2 glycerol 3 lipid 4 maltase A 4 only B 1 and 2 only C 2 and 3 only D 3 and 4 only 7 The diagram below which shows an enzymatic reaction. Which of the following statements is incorrect? A E is the ‘lock’ and F is the ‘key’ in the ‘lock and key’ hypothesis. B E is the substrate while I and J are the products. C F contains an active site which has a shape complementary to E. D The nature of F remains the same at the end of the reaction. 8 Which processes involve the action of enzymes? 1 blood clotting 2 photosynthesis 3 respiration 4 transpiration A 1 and 2 only B 2 and 4 only C 1, 2 and 3 only D 1, 3 and 4 only E F G H I J H2O

5 [Turn over 9 Four tubes containing 2 cm 3 of 1% starch solution, mixed with pancreatic juice, were treated in different ways, as shown in the table below. tube incubated at 35oC incubated at 80oC pH at 2.5 pH at 8.0 1 ✓ ✓ 2 ✓ ✓ 3 ✓ ✓ 4 ✓ ✓ After 30 minutes, the contents were tested with iodine solution. Which tube(s) will turn blue black? A 1 only B 2 only C 2, 3 and 4 only D 1, 3 and 4 only 10 What is an example of assimilation? A absorption of glycerol into lacteals B building of proteins from amino acids C production of bile to aid in fat digestion D release of insulin from the islets of Langerhans in the pancreas 11 Which of the following is an effect of alcohol on the human body? A decreased reaction time B decreased self-control C decreased risk of stomach ulcers D increased brain volume 12 A pulse can be felt on the wrist and neck. Which statement explains why a pulse is produced? A opening and closing of semi-lunar valves B opening and closing of tricuspid valve C pumping action of the arteries D pumping action of the heart

6 13 A sample of blood was taken from a patient. A drop of blood was placed on a white tile with serum containing ‘antibodies a’ and another drop of blood was placed on a separate white tile with serum containing ‘antibodies b’. The results of the test are shown. serum with antibodies a serum with antibodies b agglutination no agglutination What conclusion can be made regarding the characteristics of the patient’s blood type? A The patient’s blood type is AB. B The patient’s red blood cells contain antigen A. C The patient’s red blood cells do not contain any antigens. D The patient can donate blood to another person with blood type B. 14 The table below shows the contents of the blood samples taken from three different veins found in a human body. vein 1 vein 2 vein 3 oxygen/ arbitrary units 95 78 85 carbon dioxide/ arbitrary units 30 50 45 urea/ % 2.5 1.3 5.5 Which of the following shows the correct identities of these veins? vein 1 vein 2 vein 3 A hepatic vein pulmonary vein vena cava B pulmonary vein hepatic vein vena cava C pulmonary vein vena cava hepatic vein D vena cava pulmonary vein hepatic vein

7 [Turn over 15 The table below shows changes in the heart rate and volume of blood pumped per heartbeat of an adult man while at rest and during exercise. activity heart rate / beats per minute volume of blood pumped per beat / cm3 at rest 50 50 during exercise 200 75 What is the change in the volume of blood passing through the man’s heart per minute when he starts to exercise from rest? A decreased by 4 times B increased by 1.5 times C increased by 2.5 times D increased by 6 times 16 The following graph shows the pressure changes in the left atrium, left ventricle and aorta during a