ACSI P1 - Y4 Exp Bio Prelim 2024

6093/01/Y4Exp/Prelim/Aug2024 [Turn Over BIOLOGY 6093/01 Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 15 August 2024, Thursday 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid/tape. 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 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. This document consists of 18 printed pages, including this cover page. Anglo-Chinese School (Independent) PRELIMINARY EXAMINATION YEAR FOUR EXPRESS

2 6093/01/Y4Exp/Prelim/Aug2024 1 The diagram shows a student’s drawing of guard cells. Which labelling line is incorrect? 2 The graph shows the effect of increasing the side length of agar cubes on the surface area and the volume of the cubes. Which correctly identifies lines 1, 2 and the effect of increasing side length on the surface area to volume ratio of the cubes? line 1 line 2 surface area to volume ratio A surface area volume decreases B surface area volume increases C volume surface area decreases D volume surface area increases

3 6093/01/Y4Exp/Prelim/Aug2024 [Turn Over 3 The table shows the relative concentrations of two mineral ions in a root cell and in the water in the soil around the plant root. What is needed for the plant root to increase the concentration of the mineral ions in its cells? concentration of magnesium ions / arbitrary units concentration of nitrate ions / arbitrary units water around root 23 19 inside root cell 2475 1306 A energy for active transport B energy for osmosis C water for active transport D water for osmosis 4 Which region on the graph shows the activation energy of an enzyme-catalysed reaction? 5 Which statement about chemical digestion in the human alimentary canal is correct? A Digestion of carbohydrates is completed in the colon. B Enzymes are secreted to break down cellulose in the duodenum. C Protein digestion is completed in the ileum. D The stomach secretes enzymes to break down starch.

4 6093/01/Y4Exp/Prelim/Aug2024 6 The diagram shows part of the human alimentary canal and associated organs. Which row describes the functions of parts shown in the diagram? Structure Function Structure Function A 1 Digestion of protein 3 Absorption of products from digestion B 2 Emulsifying of fats 3 Absorption of amino acids and glucose C 4 Production of bile 5 Making digestive enzymes D 4 Storing digestive enzymes 2 Making digestive enzymes 7 The chart gives information about a car being driven at 110 km/h by someone who has not consumed alcohol. It shows how far the car travels from the time the driver sees a hazard and reacts by using the brakes and how far the car will then travel before finally stopping. If the same driver consumes alcohol before driving, the distance travelled before reacting to the hazard increases by 20%. What would then be the total distance travelled by the car before stopping? A 96 m B 100 m C 111.2 m D 115.2 m

5 6093/01/Y4Exp/Prelim/Aug2024 [Turn Over 8 The graph shows the changes in blood pressure and water potential across a blood capillary from the arterial end of the capillary to the venous end of the capillary. What could result in an accumulation of excess tissue fluid? A an increase in concentration of large proteins in the blood plasma B an increase in blood pressure C a decrease in the concentration of small proteins in tissue fluid D a decrease in blood pressure 9 The diagram shows the pressure changes in various structures of the left side of the heart during the cardiac cycle. At the end of which period is the ventricle full of blood?

6 6093/01/Y4Exp/Prelim/Aug2024 10 The diagram shows an external view of the heart of a patient with a blockage of the coronary artery. This could be treated by inserting a tube to bypass the blockage. Which two vessels would be joined by this tube? A 1 and 2 B 1 and 4 C 2 and 4 D 3 and 4 11 Which row correctly identifies the effects of carbon monoxide, nicotine and tar? effect raises blood pressure causes gene mutation reduces oxygenation of blood A carbon monoxide nicotine tar B nicotine nicotine carbon monoxide C nicotine tar carbon monoxide D tar carbon monoxide nicotine

7 6093/01/Y4Exp/Prelim/Aug2024 [Turn Over 12 The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest? 13 Lactic acid builds up in the muscles during vigorous exercise. During recovery, how is this lactic acid removed? A aerobic respiration of lactic acid in the liver B anaerobic respiration of lactic acid in the muscles C excretion of lactic acid by the lungs D removal of lactic acid by the alimentary canal 14 The diagram shows structures in a human which form and store urine. Liquids pass through tubes X, Y and Z in the directions shown by the arrows. Which statement about the volume of liquid passing through Y in one day is correct? A It is greater than that passing through X. B It is less than that passing through Z. C It is much less than that passing through X but slightly greater than that passing through Z. D It is slightly less than that passing through X but much greater than that passing through Z.

8 6093/01/Y4Exp/Prelim/Aug2024 15 The diagram shows a reflex arc in the human nervous system. The person’s finger has just made contact with a sharp object. Which part is the motor neurone? 16 The diagram shows the homeostatic control of body temperature. What are corrective mechanisms P and Q and coordinator R? corrective mechanisms coordinator R P Q A sweating more blood flows close to the skin surface brain B sweating more blood flows close to the skin surface skin C shivering less blood flows close to the skin surface brain D shivering less blood flows close to the skin surface skin

9 6093/01/Y4Exp/Prelim/Aug2024 [Turn Over 17 A student was asked to compare a typical spinal reflex action with a voluntary action. He has made one mistake in his comparison. Which row shows the incorrect statement? reflex action voluntary action A rapid response to a stimulus response may be slow B initiated by the response of a receptor to a stimulus initiated from the brain by conscious thought C the nervous impulse takes the longest pathway the nervous impulse takes the shortest pathway D effectors are muscles or glands effectors are muscles only 18 The graph shows changes in the diameter of a person’s pupils while outdoors on a sunny day. At which time did the person take off their sunglasses? 19 The diagram shows part of the human circulatory system. In which vessel do the break-down products of hormones first appear?

10 6093/01/Y4Exp/Prelim/Aug2024 20 A patient shows symptoms of unexplained weight loss, severe thirst and frequent need of urination. A test shows high levels of glucose in the urine. Which hormone can be used to treat this condition? A anti-diuretic hormone B insulin C progesterone D testosterone 21 What are characteristics of bacteria?