Christ Church Pure Biology Prelim 2024 Paper 1

CHR 2024 / Biology 6093/01/O/24 [Turn over CHRIST CHURCH SECONDARY SCHOOL 2024 PRELIMINARY EXAMINATION SECONDARY FOUR EXPRESS Biology 6093/01 Paper 1 Multiple Choice 23 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, Centre number 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 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. CANDIDATE NAME CLASS CENTRE NUMBER S INDEX NUMBER

2 CHR 2024 / Biology 6093/01/O/24 1 The diagrams show a cell from an onion and a cell from the liver. Which guideline does not point to the same structure on both diagrams? 2 Which diagram would represent a cell seen under a simple light microscope, using daylight as the only light source? A B C D A B C D

3 CHR 2024 / Biology 6093/01/O/24 [Turn over 3 The table shows the mass of four nutrients P, Q, R and S, absorbed by the roots of a plant in the presence and absence of oxygen in one hour. nutrient mass absorbed in the presence of oxygen / g h-1 mass absorbed in the absence of oxygen / g h-1 P 0.7 0.6 Q 2.5 1.2 R 3.6 3.2 S 4.8 0.8 Which of the following conclusion can be made from the data? A Nutrients P and R are mainly absorbed by diffusion. B Nutrients P, Q, R and S are absorbed through both diffusion and active transport. C Nutrients Q, R and S are mainly absorbed by active transport. D Nutrients Q and S are absorbed through active transport only. 4 The results of three food tests on a cereal are shown in the table. test colour result of test Benedict’s pale blue iodine solution blue-black Biuret pale purple Which nutrients are present in the cereal? A reducing sugar and fat B reducing sugar and protein C starch and fat D starch and protein 5 An experiment was carried out to investigate the effect of temperature on enzyme action. The graph shows the results. What are the labels for the x-axis and the y-axis? x-axis y-axis A pH time B temperature rate of reaction C rate of reaction pH D time temperature y-axis x-axis

4 CHR 2024 / Biology 6093/01/O/24 6 Four students were asked to design an investigation to determine the effect of pH on the activity of an enzyme. Which table shows the most appropriate design? A B test tube contents pH temperature/°C 1 E 3 20 2 E 7 20 3 E 12 20 4 S 3 20 5 S 7 20 6 S 12 20 test tube contents pH temperature/°C 1 E+S 3 20 2 E+S 7 20 3 E+S 12 20 4 DW+S 3 20 5 DW+S 7 20 6 DW+S 12 20 C D test tube contents pH temperature/°C 1 E+S 3 10 2 E+S 7 20 3 E+S 12 30 4 S 3 10 5 S 7 20 6 S 12 30 test tube contents pH temperature/°C 1 E+S 7 10 2 E+S 7 20 3 E+S 7 30 4 DW+S 7 10 5 DW+S 7 20 6 DW+S 7 30 E = Enzyme S = Substrate DW = Distilled Water 7 How do muscles of the wall of the alimentary canal act when pushing a bolus of food along? circular muscles behind bolus longitudinal muscles behind bolus A contract contract B contract relax C relax contract D relax relax

5 CHR 2024 / Biology 6093/01/O/24 [Turn over 8 The diagram shows some organs of the digestive system. What would be a likely consequence of switching the positions of X and Y of the alimentary canal? A Digestive enzymes would be denatured. B The intestinal contents would be highly alkaline and would damage the walls of Y. C The intestinal contents would be too dry and unable to pass through X properly. D Water absorption would be highly reduced. 9 Morbidly obese patients may consider having gastric bypass surgery where the size of organ Q is drastically reduced. Which of the following would not be a consequence of this? A drastic weight loss B malnutrition C protease will be unable to function properly D the inability to consume large amounts of food at one sitting X Y Q X Y Q

6 CHR 2024 / Biology 6093/01/O/24 10 The diagram shows a vertical section of the heart. What causes the valve labelled X to close? A blood being forced into the ventricle B contraction of the ventricle C contraction of the atria D relaxation of the atria 11 The diagram shows the oxygen levels at different altitudes. Which factors would help a person to adjust from living at a low altitude to living at a high altitude? 1. formation of fewer red blood cells 2. an increase in the oxygen-carrying capacity of the blood 3. an increase in the output of blood by the heart A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only X

7 CHR 2024 / Biology 6093/01/O/24 [Turn over 12 The diagram shows part of the circulatory system in a mammal. Where is the blood pressure and the speed of flow the lowest? lowest blood pressure lowest speed of flow A 1 4 B 2 3 C 3 2 D 4 1 13 The diagram shows the epithelial cells of the trachea. A patient was discovered to not possess any cell P. As a result, he constantly complains of his throat being dry and irritated. Which of the following is a likely function of cell P? A the detection of harmful chemicals B the production of mucus C the sweeping of dirt up and out of the trachea D the warming of air entering the lungs P 1 2 3 4 direction of blood flow vena cava aorta direction of blood flow P

8 CHR 2024 / Biology 6093/01/O/24 14 The diagram shows the apparatus that can be used to demonstrate some of the movements during breathing. The handle is pulled down moving the rubber sheet in the direction of the arrow. What happens to the air pressure in W, the volume of X and the direction of air flow in Y? air pressure in W volume of X direction of air flow in Y A increases increases passes out B increases decreases passes in C decreases increases passes in D decreases decreases passes out 15 The diagram shows a nephron. Which of the following correctly relates the structure to its respective function? structure function A P selective reabsorption B Q ultrafiltration C R ultrafiltration D S secretion of ADH Y tubing X balloon W bell jar cork handle rubber sheet P Q R S

9 CHR 2024 / Biology 6093/01/O/24 [Turn over 16 The following diagram represents a dialysis machine. Which substances in the dialysis fluid must be at the same concentration as that in blood? A amino acids and urea B glucose and amino acids C glucose and urea D urea and salts 17 The graphs show how four different conditions in the body may change with time. In which graph is the condition b