GCSE (9 1) Combined Science (Biology) A (Gateway Science) J250/01 Paper 1, B1 B3 and CS7 (PAGs B1 B5)

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1 Oxford ambridge and RS GSE (9 1) ombined Science (iology) (Gateway Science) J250/01 Paper 1, 1 3 and S7 (PGs 1 5) (Foundation Tier) F Year 11 Test Time allowed: 1 hour 10 minutes You must have: a ruler (cm / mm) You may use: a scientific or graphical calculator an H pencil First name Last name entre number andidate number INSTRUTIONS Use black ink. You may use an H pencil for graphs and diagrams. omplete the boxes above with your name, centre number and candidate number. nswer all the questions. Write your answer to each question in the space provided. dditional paper may be used if required but you must clearly show your candidate number, centre number and question number(s). INFORMTION The total mark for this paper is 60. The marks for each question are shown in brackets [ ]. Quality of extended responses will be assessed in questions marked with an asterisk (*). This document consists of 16 pages. (KN/SG) /5 OR is an exempt harity Turn over

2 2 Section nswer all the questions. You should spend a maximum of 20 minutes on this section. 1 Students measure their heart rate before and after exercise. They plot their results as a scatter graph. Heart rate after (bpm) Heart rate before (bpm) Which of these statements best describes the graph? Negative correlation with no anomalies Negative correlation with an anomaly Positive correlation with no anomalies Positive correlation with an anomaly 2 Where in the cell are chromosomes found? ell membrane ell wall ytoplasm Nucleus J250/01

3 3 student uses a microscope to measure the diameter of different blood vessel lumen. The table shows their results. lood vessel iameter of lumen (µm) E 260 F 140 G What is the median for these results? student plants some cress seeds. They grow 2 cm overnight. What causes this growth? ell cycle ell differentiation N replication Movement of chromosomes J250/01 Turn over

4 5 Which process describes movement of particles against a concentration gradient? 4 ctive transport iffusion Evaporation Osmosis 6 Which of these is found in a fully developed red blood cell? hlorophyll N Haemoglobin Nucleus 7 Which part of a plant contains stem cells? Meristem Phloem Root hair Xylem J250/01

5 5 8 The length of a prokaryotic cell is 0.8 µm. What is the length of this prokaryotic cell in mm? 0.8 mm 0.08 mm mm mm 9 Which of these describes anaerobic respiration in fungi? Endothermic reaction that produces carbon dioxide Endothermic reaction that uses oxygen Exothermic reaction that produces carbon dioxide Exothermic reaction that uses oxygen 10 Red blood cells are placed in pure water. Which statement explains what will happen to the blood cells? They burst as water enters from an area of higher water potential. They burst as water enters from an area of lower water potential. They shrink as water leaves from an area of higher water potential. They shrink as water leaves from an area of lower water potential. J250/01 Turn over

6 6 Section nswer all the questions. 11 Look at the picture. It shows a model that represents the structure of N. (a) omplete these sentences about N. hoose words from the list. helix monomer polymer protein substrate N is made up of small units joined together, so it is described as a.... The two strands are twisted to form a double.... [2] J250/01

7 (b) student compares the amount of N in onion and peas. This is what they do: 7 Put pieces of onion into a blender with salt and cold water and blend to a thick soup Use a sieve to strain the mixture and collect the liquid in a beaker, add washing up liquid and mix Leave in a water bath at 60 for 10 minutes and pour some of the mixture into a test tube Leave the mixture to cool, then add a few drops of protease enzyme Slowly pour cold ethanol into the test tube and collect the N that forms by twisting it onto a wooden stick Repeat all the steps using peas Measure the mass of N collected each time. (i) What is the independent variable in this investigation?... (ii) The student uses 100 cm 3 of cold water and 0.1 g of salt each time. Write down two other variables they will need to control.... [2] (c) The student leaves the mixture to cool before adding the protease enzyme. Explain why [2] J250/01 Turn over

8 (d) The student repeats the investigation three times and records their results. 8 Food Mass of N collected (g) Test 1 Test 2 Test 3 Mean mass (g) Onion Peas (i) alculate the mean mass for each set of results. Give your answers to 1 decimal place. Write your answers in the table. [2] (ii) The student did not leave the N to dry before measuring the mass. Explain why this means their results may not be valid.... [2] J250/01

9 12 The diagram represents a process that occurs inside the leaves of a maple tree. 9 Sunlight Oxygen Reactant X Reactant Y Glucose (a) (i) The process produces oxygen and glucose. Write down the name of this process.... (ii) Write down the names of the two reactants X and Y.... and... (b) The glucose made in the maple leaves is transported away from the leaves by specialised cells. Write about this transport process. Include the: Name of the cells involved Name of the process What happens to the glucose [3] J250/01 Turn over

10 13* The pictures show different plant cells seen using a light microscope. 10 Onion bulb cells Leaf cells Nucleus hloroplast The onion bulb grows underground while the leaf is found above ground. ompare the structures visible in the two types of cells. Explain the reasons for any differences. Include ideas about the function of the structures in your answer [6] J250/01

11 11 14 John is stung by a wasp. He automatically pulls his hand away from the wasp. The diagram shows the reflex arc involved in his reaction. (a) Write down the names of the parts labelled, and [3] (b) (i) What is the stimulus in this reflex?... (ii) What is the effector in this reflex?... J250/01 Turn over

12 (c) Scientists investigated the reaction times of six males of different ages. 12 Each male was asked to press a button when they saw a light come on. The scientists recorded the time taken for each male to press the button. The graph shows their results Reaction time (s) ge (years) (i) recent report suggests that the risk of having a car accident is higher in drivers over the age of 60 than younger drivers. Suggest why. Use the data in the graph to help you.... [2] (ii) Suggest two ways the scientists could have improved their investigation [2] J250/01

13 13 15 The diagrams show a bird heart and a human heart. The function of the bird heart is similar to that of the human heart. ird heart Human heart X Left atrium Right atrium Left ventricle Right ventricle [Not to scale] (a) The blood vessels of the bird heart are the same as those of a human heart. They are also attached in the same way. (i) Write down the name of the blood vessel labelled X on the bird heart.... (ii) escribe one difference between the walls of the bird s left and right ventricle. Suggest a reason for this difference.... [2] (b) Write about how the structure of the hearts are similar and how they are different. Similar ifferent [4] J250/01 Turn over

14 16 student investigates the factors that affect the rate of water uptake in plants. 14 ut shoot Reservoir ir bubble apillary tube Ruler eaker of water (a) Write down the name of the set of apparatus shown in the diagram.... (b) The apparatus was put together and the shoot was cut from the plant underwater. Explain why [2] J250/01

15 15 (c) The student investigates four different conditions. For each condition, they measure the time it takes for the air bubble to move 50 mm along the ruler. They then calculate the rate of movement. The table shows their results. onditions Rate of movement of air bubble (mm / minute) Still air with light 10.0 Still air in dark 1.1 Warm moving air with light 18.2 Still air with light and less surface area on the shoot for water loss (i) To change the conditions to dark, the student placed a black plastic bag over the cut shoot. escribe how the student could have changed the following conditions: Warm moving air... Less surface area on the shoot for water loss... [2] (ii) The student found that the air bubble moved 50 mm in 8 minutes when they decreased the surface area. alculate the rate of movement. Give your answer to 2 significant figures. nswer :... mm / minute [2] J250/01 Turn over

16 16 (iii) escribe and explain how each factor has affected the rate of water uptake in the shoot. ark... Warm moving air... Less surface area on the shoot for water loss... [3] (d) The water is transported through the plant in special vessels. Explain how the structure of these vessels is adapted to their function [2] EN OF QUESTION PPER Oxford ambridge and RS opyright Information OR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OR has attempted to identify and contact all copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OR opyright cknowledgements ooklet. This is produced for each series of examinations and is freely available to download from our public website ( after the live examination series. If OR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OR will be happy to correct its mistake at the earliest possible opportunity. For queries or further information please contact the opyright Team, First Floor, 9 Hills Road, ambridge 2 1GE. OR is part of the ambridge ssessment Group; ambridge ssessment is the brand name of University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. J250/01