Dunman 2024 6093 P1 prelims QP

This document consists of 18 printed pages. DUNMAN SECONDARY SCHOOL CANDIDATE NAME CLASS INDEX NUMBER PRELIMINARY EXAMINATION 2024 SECONDARY 4 EXPRESS BIOLOGY 6093/01 Paper 1 28 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet 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 Answer Sheet in the spaces provided unless this has been done for you. There are forty questions on this paper. Answer all questions. For each questions 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.

2 6093/01/Prelim/4Exp/2024 1 Which cell is adapted for absorption? 2 Which structures will be present in a cell that causes pneumococcal disease? 1 circular DNA 2 cell wall 3 chloroplast A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 3 Which row shows the structures found in a red blood cell? nucleus cell membrane cell wall chloroplast vacuole A ✓ ✓ ✓ ✓ ✘ key B ✓ ✓ ✘ ✘ ✓ ✓ = present C ✘ ✓ ✘ ✘ ✓ ✘ = not present D ✘ ✘ ✓ ✘ ✘ A B C D

3 6093/01/Prelim/4Exp/2024 4 Five pieces of strips are cut from the same potato, all of equal size and shape. The strips are placed in sugar solutions of different concentrations. After four hours, the change in length of each potato piece is measured. The results are shown in the graph. Which concentration of sugar solution has approximately the same water potential as the potato? A 0.00 mol dm-3 B 0.15 mol dm-3 C 0.30 mol dm-3 D 0.40 mol dm-3 5 The bar chart shows the concentration of magnesium ions in the soil and in a plant root. How do magnesium ions move from the soil into the root? A active transport B diffusion C osmosis D transpiration percentage change in length of potato concentration of sugar solution (mol dm-3) soil root soil root concentration of magnesium ions

4 6093/01/Prelim/4Exp/2024 6 Some of the molecules found in animal tissues are grouped into three lists. 1 glucose, fats, proteins, water 2 glycogen, antibodies, adenine, fats 3 haemaglobin, oxygen, DNA, fatty acids Which lists include one or more molecules that always contain nitrogen atoms? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 7 A positive food test produces an orange precipitate. Which test was performed? A Amino acids were mixed with cold biuret solution. B Glucose was heated with Benedict’s solution. C Protein was heated with Benedict’s solution. D Protein was mixed with biuret solution and heated. 8 The diagram shows a protease enzyme catalysing the breaking of part of a protein molecule into smaller pieces. Which diagram has three correct labels? A B C D active site active site active site substrate substrate substrate enzyme enzyme product enzyme product product

5 6093/01/Prelim/4Exp/2024 9 An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results. What are the labels for the x-axis and y-axis? x-axis y-axis A pH rate of reaction B pH time C rate of reaction pH D time pH 10 The diagram shows a section of the small intestine in which partially digested food is being pushed along. What is the state of the longitudinal muscles at 1 and 2? 1 2 A contracted contracted B contracted relaxed C relaxed contracted D relaxed relaxed y-axis x-axis partially digested food circular muscle longitudinal muscle direction of movement 1 2

6 6093/01/Prelim/4Exp/2024 11 The diagram shows part of the alimentary canal and its associated organs. Where does most water absorption take place? 12 The diagram shows the pressures in the left side of the heart during one heartbeat. Which valve is open and which is closed at the time marked X? bicuspid semi-lunar A closed closed B closed open C open closed D open open A B C D key left ventricle aorta left atrium time / s pressure / kPa X

7 6093/01/Prelim/4Exp/2024 13 The table shows substances passing between capillaries and tissues in a part of the body. substance into the capillaries from the tissues out of the capillaries into the tissues oxygen ✓ key carbon dioxide ✓ ✓ = does pass amino acids ✓ urea ✓ In which part of the body are these capillaries? A between the alveoli B in the kidney C in the liver D in the villi 14 The diagram shows how the pressure and volume inside the lungs change during one complete breath. At which point are the muscles of the diaphragm starting to contract? 2.0 2.5 time / s volume of lungs / dm3 pressure in lungs 0 1 2 3 volume pressure A B C D

8 6093/01/Prelim/4Exp/2024 15 The diagram shows some of the structures in a human lung. Where is carbon dioxide concentration the highest? 16 The diagram shows how a kidney dialysis machine works. Each shape represents a molecule found in blood or dialysis fluid. Which shape represents urea? A B C D to pulmonary vein from pulmonary artery A B C D dialysis membrane blood in blood out dialysis fluid out dialysis fluid in

9 6093/01/Prelim/4Exp/2024 17 Which mechanism for maintaining body temperature involves the action of muscles? A detection of temperature B insulation with fatty tissue C shivering D sweating 18 The diagram shows part of the process of thermoregulation of the blood. Why is this a negative feedback system? A It decreases the temperature blood. B It increases any change in the temperature blood. C It increases the temperature blood. D It reverses any change in the temperature of blood. 19 The diagram shows the structure of the eye. Which structure refracts light? temperature rising temperature falling less sweat secreted more sweat secreted C D A B

10 6093/01/Prelim/4Exp/2024 20 The diagram shows a simple reflex arc. Which is the correct order of events after the knee is tapped? A 1  2  3  4 B 1  4  2  3 C 4  2  1  3 D 4  3  2  1 21 The graph shows changes in a person’s blood glucose concentration over four hours. At which point of the graph is insulin secreted? 2 sensory neurone activated 3 muscle stimulated 4 receptor stimulated knee tapped here 1 motor neurone activated 0 1 2 3 4 blood glucose A B C D