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 pro