2025 FUHUA BIO P1 w/ ANS

[Turn Over Candidate Name: Class: Index No.: FUHUA SECONDARY SCHOOL Secondary Four Express PRELIMINARY EXAMINATION 2025 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 6093/01 Paper 1 Additional Materials: OMR Sheet DATE 3 September 2025 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 Germain Kang Vetter: Mr Nicholas Liu This document consists of 18 printed pages and 2 blank pages.

2 Multiple-Choice Questions [40 marks] Shade your answers on the OMR sheet provided. 1 The diagram below shows the structure of an animal cell. In which cell organelle is glucagon modified before secretion out of the cell? 2 The diagram refers to some structures found in cells. Which area in the diagram represents root hair cell and xylem respectively? root hair cell xylem A 4 1 B 5 2 C 6 3 D 7 7

3 [Turn Over 3 Which correctly identifies the processes involved in the absorption of these substances in a healthy kidney nephron? glucose urea water A diffusion osmosis active transport B osmosis diffusion dialysis C active transport diffusion osmosis D active transport osmosis diffusion 4 The diagrams below show plant cells before and after being placed in sugar solution. Which of the following explains the change? reason process sugar solution A sugar molecules enter the cells active transport dilute B sugar molecules exit the cells active transport concentrated C water molecules enter the cells osmosis dilute D water molecules exit the cells osmosis concentrated 5 Which element from a molecule of urea shows that it is formed from amino acids and not from glucose? A carbon B hydrogen C nitrogen D oxygen before after

4 6 An enzyme extracted from a bacteria living in hot springs is known to have an optimum temperature between 90 oC to 95 oC. Which of the following represents the rate of reaction of this enzyme against temperature? 7 The table below shows the results of experiments performed at 37 oC. test tube substances added to test tube food tests carried out 20 minutes after start of experiment iodine test Benedict’s test 1 5 ml of Y + 3 ml of water blue black blue 2 5 ml of Y + 2 ml of Z + 1 ml of HCl blue black blue 3 5 ml of Y + 2 ml of Z + 1 ml of NaOH brown brick red 4 5 ml of Y + 2 ml of boiled Z + 1 ml of water blue black blue Which of the following correctly states the identity of Y, Z and product of the reaction? Y Z product of the reaction A glycogen saliva non-reducing sugar B glycogen saliva reducing sugar C starch gastric juice reducing sugar D starch pancreatic juice reducing sugar rate of reaction rate of reaction rate of reaction rate of reaction temperature / oC temperature / oC temperature / oC temperature / oC A B C D

5 [Turn Over 8 Which process can still be carried out in a patient with liver failure? A breakdown of alcohol B conversion of glucose to glycogen C metabolism of amino acids to urea D production of trypsin 9 The diagram shows an intestinal villus and its cross section. Which nutrient is absorbed by structure Z? A amino acids B fats C glucose D glycogen 10 The diagram shows a bolus of food moving along the oesophagus. Which row describes the condition of the muscles at X and Y? X Y A contracted contracted B contracted relaxed C relaxed contracted D relaxed relaxed X Y Z X Y bolus of food direction of movement

6 11 The graph below shows how pH changes along the alimentary canal. Which correctly identifies the enzymes that can be found in region X and Y? X Y A amylase lipase B maltase trypsin C pepsin amylase D trypsin pepsin 12 Which is the pulmonary vein? feature blood direction of blood flow lumen muscle layer A deoxygenated away from the heart narrow thick B deoxygenated towards the heart wide thin C oxygenated away from the heart narrow thick D oxygenated towards the heart wide thin 13 What is the sequence of the steps for blood clotting? 1 thrombin converts fibrinogen into fibrin 2 thrombokinase is produced by damaged platelets 3 thrombokinase comes into contact with calcium ions 4 thrombokinase activates prothrombin into thrombin A 1→ 2 → 3 → 4 B 1 → 2 → 4 → 3 C 2 → 3 → 4 → 1 D 2 → 4 → 3 → 1 pH distance along the alimentary canal X Y

7 [Turn Over 14 The graph shows the pressure changes in the aorta and the left side of the heart during one cardiac cycle. Points 1, 2, 3 and 4 indicate when atrio-ventricular valves and semi-lunar valves either open or close. What is the total time during one cardiac cycle that the atrio-ventricular valves and the semi- lunar valves are both closed at the same time? A 0.03 s B 0.07 s C 0.12 s D 0.25 s pressure/ kPa key left ventricle aorta left atrium time /s 2 3 1 4

8 15 The diagram below shows the characteristics of three types of blood vessels. Which of the following correctly identifies regions X, Y and Z? X Y Z A arteries capillaries veins B arteries veins capillaries C capillaries arteries veins D veins capillaries arteries 16 The diagram below shows the longitudinal section of the human thorax. Structures X, Y and Z are different sets of muscles. What occurs so that inhalation can take place? X Y Z A contract relax contract B contract relax relax C relax contract contract D relax contract relax regions: X Y Z blood pressure speed of blood flow total cross- sectional areas of blood vessels X Y Z

9 [Turn Over 17 The diagram shows the oxygen uptake of a man before, during and after strenuous exercise. Which region represents the repayment of oxygen debt? 18 In the kidney dialysis machine, protein molecules are not lost from the blood. How is the loss prevented? A Dialysis fluid contains protein molecules to prevent a steep concentration gradient. B Protein molecules are actively transported back into the blood. C Protein molecules are too large to diffuse across the dialysis membrane and out of the blood. D Protein molecules in the blood and the dialysis fluid diffuse to reach an equilibrium.