TKGS 2024 S4 Prelim Bio Paper 1

1 This document consists of 20 printed pages. TANJONG KATONG GIRLS’ SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR EXPRESS CANDIDATE NAME CLASS 4 INDEX NUMBER BIOLOGY 6093/01 Paper 1 Multiple Choice 22 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Write your name, index number on the Answer Sheet. There are forty questions in 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 scientific calculator is expected, where appropriate. Setter: Mr Lim Kok Siong Marker: Mr Lim Kok Siong

2 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 1 The diagram shows a cell viewed under an electron microscope. Which structure is responsible for the modification and packaging of substances for secretion out of the cell? 2 A unicellular organism containing sodium ions at a concentration of 0.1 mM lives in a pond of sodium concentration 0.01mM. How does the organism absorb sodium ions? A osmosis B diffusion C ingestion D active transport A B C D

3 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 3 The diagram shows an experiment setup to investigate osmosis. What will happen to the liquid levels in tube X and tube Y after 30 minutes? tube X tube Y A rise fall B fall rise C rise rise D fall fall 4 During deamination, which element is significantly removed from an amino acid molecule? A carbon B oxygen C nitrogen D hydrogen knot tube X tube Y glass beaker dialysis tubing 10% sucrose solution 5% sucrose solution knot dialysis tubing 15% sucrose solution

4 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 5 The graph shows two possible energy changes of an enzyme-controlled reaction. Which represents the activation energy of the reaction with and without the enzyme? with enzyme without enzyme A 1 + 2 1 B 1 2 C 1 + 3 2 + 3 D 1 2 – 1 substrate energy 1 2 product 3

5 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 6 The graph shows the rate of reaction of an enzyme under different pH. Which statement is correct? A The enzyme is inactive at pH 2. B The time taken for the reaction to complete is highest around pH 6. C The rate of enzyme-substrate complexes formed is highest at pH 6. D The collision of enzyme and substrate molecules is highest at pH 5. 7 A student mixes 2 cm 3 of starch to 1 cm 3 of salivary amylase in a test tube. He leaves the test tube standing for 30 minutes. What are the colour observations if the student perform iodine and Biuret tests on the contents in the test tube? A yellowish brown and blue colourations B yellowish brown and violet colourations C blue-black and blue colourations D blue-black and violet colourations rate of reaction / units 2 3 4 5 6 7 8 pH / units

6 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 8 The diagram shows a section of the alimentary canal. What processes are occurring at P, Q and R? P Q R A assimilation detoxification storage B digestion storage absorption C digestion detoxification secretion D egestion absorption digestion 9 The diagram shows a tissue found in the small intestine. Which adaptation is not true to the description made of the tissue? description adaptation A thin epithelium absorbs protein more efficiently B dense network of blood capillaries transports glucose C presence of microvilli absorbs nutrients more efficiently D highly folded more surface area to volume ratio for more absorption P Q R

7 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 10 The diagram shows part of the circulatory system. Which row shows the correct blood vessels? hepatic portal vein hepatic vein renal vein A 2 5 1 B 5 6 7 C 6 4 3 D 6 5 7 11 Which is a correct property of a blood capillary? A The blood capillary is one-cell thick. B The wall of the blood capillary is partially permeable. C The blood capillary can vasodilate due to muscle cells in its walls. D The blood pressure in the blood capillary is the lowest compared to the artery and the vein. lungs 1 intestines liver kidney heart 2 3 4 5 6 7

8 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 12 A person who is blood group A can ____________________. A donate blood to blood group O B donate blood to blood group AB C receive blood from blood group B D receive blood from blood group AB 13 The Heimlich maneuver is a first -aid method administered to a person who is experiencing choking. It involves thrusting in the abdominal area of the person to force the object that causes the individual to choke out of the body. With respect to pressure and volume in the thoracic cavity, w hat is the best explanation for this? thoracic cavity volume pressure A decrease decrease B increase decrease C decrease increase D increase increase 14 What changes will have occured to cause muscle fatigue? glycogen lactic acid pH A decreased increased decreased B decreased decreased increased C increased increased decreased D increased decreased increased

9 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 15 The diagram shows an experiment setup to investigate respiration in an insect. What does the experiment measure and what is the purpose of calcium hydroxide solution? experiment measures calcium hydroxide A amount of oxygen absorbed absorb oxygen B amount of oxygen absorbed absorb carbon dioxide C amount of carbon dioxide released release oxygen D amount of carbon dioxide released release carbon dioxide 16 What is the significance in the directions of flow of the dialysis fluid and blood in kidney dialysis? A Speed up the flow of blood in the kidney dialysis machine. B Slow down the transfer of waste products in the dialysis machine. C Ensure that waste products will continuously enter the dialysis fluid. D Ensure that the difference in the concentrations of waste products in blood and dialysis fluid is small. indicator to record movement paper soaked with calcium hydroxide solution

10 Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2024 17 The diagram shows a section through a skin of a man. Which parts will be activated when the man moves from a hot kitchen into an air- conditioned room? A 1 and 2 only B 2 and 3 only C 3 and 4 only D 2, 3 and 4 only 18 Which statements on the endocrine gland are correct? 1 secretes substances through ducts 2 substances are produced by the brain 3 production of substances is involuntary 4 substances secreted are transported by blood A 1 and 2 only B 3 and 4 only C 1, 2 and 3 only D 1, 3 and 4 only blood capillary 1 2 3 4