YYSS Pure Bio 2024 P1, P2, MS

YUYING SECONDARY SCHOOL PRELIMINARY EXAMINATION Secondary 4 Express NAME CLASS REG. NO BIOLOGY 6093/1 Paper 1 22 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet Setter: Mr Darren Kung READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on this question booklet and the separate Answer Sheet. 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 Answer 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 calculator is expected, where appropriate. For Examiner’s Use Total

2 1 Which organelle is not correctly paired with its cellular function? organelle function A endoplasmic reticulum transports proteins to the Golgi body B Golgi body stores proteins and carbohydrates C mitochondrion releases energy D ribosome joins amino acids together 2 Which statement about the muscle cells is incorrect ? A They contain few mitochondria. B They contain many nuclei. C They contract and relax to produce movement. D They have contractile protein fibres. 3 The diagram shows an experiment demonstrating osmosis using a dialysis tubing bag. After 30 minutes, the level of the liquid in the glass tube goes ......1...... because the water had a ......2...... water potential than the sugar solution. Which words correctly complete the statement? 1 2

3 A down lower B down higher C up lower D up higher 4 The diagram shows part of a protein molecule. What does X represent? A amino acid B fatty acid C glycerol D sugar 5 Which food-testing solution shows a positive result when it turns from blue to purple? A Benedict’s solution B biuret solution C ethanol D iodine solution 6 The apparatus shown is used for an experiment on starch digestion. Which test-tube contains the most sugar after 20 minutes?

4 7 Which of the following is not an effect of alcohol consumption on the body? A brain damage B decreased reaction time C decreased self-control D liver disease 8 Which row correctly indicates the structural properties of a villus that allow the rate of absorption in the small intestine to increase? rich network of capillaries folding of the cell membrane thick surface epithelium A ✔ ✔ ✔ B ✔ ✔ 🗶 C ✔ 🗶 ✔ D 🗶 ✔ 🗶 9 The diagram shows a section of the alimentary canal pushing along partially digested food. Muscle Y is contracting at point Z. Which row correctly identifies the muscles and direction of movement of the partially digested food? muscle X muscle Y direction of movement A circular longitudinal left to right B circular longitudinal right to left C longitudinal circular left to right D longitudinal circular right to left

5 10 Which statements describe how the structures in the circulatory system function? 1 has a muscular pump to push blood into vessels 2 valves ensure one-way blood flow 3 veins to take blood away from the heart 4 has vessels to return blood to the heart A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4 11 The diagram shows one of the mechanisms used by the immune system to destroy a pathogen that enters the body. Which row describes the structures involved? structure X X is made by structure Y A antigen lymphocytes antibody B antigen phagocytes antibody C antibody lymphocytes antigen D antibody phagocytes antigen 12 A student measured his oxygen consumption before, during and after exercise. The results are shown in the graph.

6 At which time is the oxygen debt being removed? A 5–10 minutes B 5–15 minutes C 15–20 minutes D 20–25 minutes 13 During inspiration, the processes listed take place. P volume of the chest cavity increases Q air rushes into the lungs R pressure in the lungs decreases S external intercostal muscles contract T diaphragm moves down, ribs move upwards and outwards What is the correct sequence for these processes? A Q → P → S → R → T B S → T → P → R → Q C Q → P → S → T → R D S → Q → R → P → T 14 Which row describes the functions of the bladder, kidneys and liver? production of urea excretion of urea storage of urine A liver bladder kidneys B bladder kidneys liver

7 C liver kidneys bladder D kidneys liver bladder 15 Which statement correctly explains the difference in amino acid concentration in the kidney tubule between X and Y? A Amino acid concentration is higher at X than at Y because amino acids move out of the kidney tubule by osmosis. B Amino acid concentration is higher at X than at Y because amino acids have been actively transported out of the kidney tubule. C Amino acid concentration is higher at Y than at X because amino acids diffuse into the kidney tubule. D Amino acid concentration is higher at Y than at X because amino acids have been actively transported into the kidney tubule. 16 Which row shows where glucose will be found in the body of a healthy human after eating a meal? renal artery renal vein glomerulus nephron ureter A yes no yes yes yes B yes yes no no no C yes yes yes yes no D no yes no no yes 17 Which statement best describes dialysis fluid entering a dialysis machine? A It has a higher concentration of urea than the blood entering the dialysis machine. B It has a higher concentration of urea than the blood leaving the dialysis machine. C It has a lower concentration of urea than the blood entering the dialysis machine. D It has a lower concentration of urea than the blood leaving the dialysis machine. 18 At which part of the kidney tubule does anti-diuretic hormone (ADH) have its effect and what effect does it have? part effect

8 A glomerulus less water reabsorbed B glomerulus more water reabsorbed C collecting duct less water reabsorbed D collecting duct more water reabsorbed 19 Which changes occur in an eye when it focuses on distant objects? ciliary muscle lens suspensory ligaments A contracts thicker slacken B relaxes thinner tighten C contracts thicker tighten D relaxes thinner slacken 20 A boy accidentally touches a very hot object and immediately takes his hand away. What is the effector in this reflex action? A a heat receptor in his hand B a motor neurone C a muscle in his arm D the spinal cord 21 A scientist investigated the effect of drinking iced water on skin temperature. She drank a large volume of iced water and monitored the temperature of her skin. The results are shown on the graph.

9 Which explanation of the change in skin temperature during the first 10 minutes is correct? A Vasoconstriction occurred, increasing blood flow to the skin. B Vasoconstriction occurred, reducing blood flow to the skin. C Vasodilation occurred, increasing blood flow to the skin. D Vasodilation occurred, reducing blood flow to the skin. 22 Which is a common symptom of both influenza and pneumococcal disease? A cough B nausea C runny nose D skin rash 23 Which of the following is present in a virus but not in a bacterium? A cell wall B nucleus C protein coat D ribosome 24 Which row shows structures that are present in bo